default search action
Petros S. Bithas
Person information
Refine list
refinements active!
zoomed in on ?? of ?? records
view refined list in
export refined list as
2020 – today
- 2024
- [j51]Liang Yang, Jinming Xiang, Sai Li, Xingwang Li, Kefeng Guo, Mazen O. Hasna, Petros S. Bithas:
Performance Analysis of Relay-Aided Satellite-Underwater Acoustic Communication Systems. IEEE Trans. Commun. 72(6): 3511-3525 (2024) - [j50]George A. Ropokis, Petros S. Bithas:
Multi-Antenna Wireless Powered Relaying: Low Complexity and Near Optimal Techniques for Generic EH Models. IEEE Trans. Green Commun. Netw. 8(2): 686-700 (2024) - [j49]Petros S. Bithas, George A. Ropokis, George K. Karagiannidis, Hector E. Nistazakis:
UAV-Assisted Communications With RIS: A Shadowing-Based Stochastic Analysis. IEEE Trans. Veh. Technol. 73(7): 10000-10010 (2024) - [j48]Zhichen Xiao, Liang Yang, Petros S. Bithas, Imran Shafique Ansari, Xingwang Li, Mohamed-Slim Alouini:
Performance Analysis of Mixed Underwater Acoustic/Optical Relaying Systems. IEEE Trans. Wirel. Commun. 23(9): 11357-11371 (2024) - [i6]Harris K. Armeniakos, Petros S. Bithas, Konstantinos N. Maliatsos, Athanasios G. Kanatas:
Joint Energy and SINR Coverage Probability in UAV Corridor-assisted RF-powered IoT Networks. CoRR abs/2409.07333 (2024) - 2023
- [j47]Charalampos K. Armeniakos, Viktor Nikolaidis, Vasileios Tsekenis, Konstantinos N. Maliatsos, Petros S. Bithas, Athanasios G. Kanatas:
Human fall detection using mmWave radars: a cluster-assisted experimental approach. J. Ambient Intell. Humaniz. Comput. 14(9): 11657-11669 (2023) - [j46]Nikolaos Nomikos, Panagiotis K. Gkonis, Petros S. Bithas, Panagiotis Trakadas:
A Survey on UAV-Aided Maritime Communications: Deployment Considerations, Applications, and Future Challenges. IEEE Open J. Commun. Soc. 4: 56-78 (2023) - [j45]Lefteris Tsipi, Michail Karavolos, Petros S. Bithas, Demosthenes Vouyioukas:
Machine Learning-Based Methods for Enhancement of UAV-NOMA and D2D Cooperative Networks. Sensors 23(6): 3014 (2023) - [j44]Petros S. Bithas, Aris L. Moustakas:
Generalized UAV Selection With Distributed Transmission Policies. IEEE Trans. Commun. 71(2): 741-756 (2023) - [j43]Liang Yang, Wei Zhang, Petros S. Bithas, Hongwu Liu, Mazen O. Hasna, Theodoros A. Tsiftsis, Derrick Wing Kwan Ng:
Covert Transmission and Secrecy Analysis of RS-RIS-NOMA-Aided 6G Wireless Communication Systems. IEEE Trans. Veh. Technol. 72(8): 10659-10670 (2023) - [c29]Valentine A. Aalo, Petros S. Bithas, George P. Efthymoglou:
Beacon-Assisted Wireless Powered Communications in Nakagami-m Fading with Multiple Interferers. VTC Fall 2023: 1-6 - 2022
- [j42]Petros Balios, Philotas Kyriakidis, Stelios Zimeras, Petros S. Bithas, Lambros Sarakis:
Motion Shield: An Automatic Notifications System for Vehicular Communications. Sensors 22(6): 2419 (2022) - [j41]Charalampos K. Armeniakos, Petros S. Bithas, Athanasios G. Kanatas:
Finite Point Processes in a Truncated Octahedron-Based 3D UAV Network. IEEE Trans. Veh. Technol. 71(7): 7230-7243 (2022) - [j40]George A. Ropokis, Petros S. Bithas:
Wireless Powered Relay Networks: Rate Optimal and Power Consumption-Aware WPT/SWIPT. IEEE Trans. Veh. Technol. 71(8): 8574-8590 (2022) - [j39]Sai Li, Liang Yang, Jiayi Zhang, Petros S. Bithas, Theodoros A. Tsiftsis, Mohamed-Slim Alouini:
Mixed THz/FSO Relaying Systems: Statistical Analysis and Performance Evaluation. IEEE Trans. Wirel. Commun. 21(12): 10996-11010 (2022) - [c28]Michail Karavolos, Lefteris Tsipi, Petros S. Bithas, Demosthenes Vouyioukas, P. Takis Mathiopoulos:
Satellite Aerial Terrestrial Hybrid NOMA Scheme in 6G Networks: An Unsupervised Learning Approach. 6GNet 2022: 1-5 - [i5]Nikolaos Nomikos, Panagiotis K. Gkonis, Petros S. Bithas, Panagiotis Trakadas:
A Survey on UAV-Aided Maritime Communications: Deployment Considerations, Applications, and Future Challenges. CoRR abs/2209.09605 (2022) - 2021
- [j38]Petros S. Bithas, Francisco Javier López-Martínez:
Throughput Analysis in a Wireless Powered Mobile Communication System. IEEE Access 9: 157215-157221 (2021) - [j37]Emmanouel T. Michailidis, Petros S. Bithas, Nikolaos Nomikos, Demosthenes Vouyioukas, Athanasios G. Kanatas:
Outage probability analysis in multi-user FSO/RF and UAV-enabled MIMO communication networks. Phys. Commun. 49: 101475 (2021) - 2020
- [j36]Valentine A. Aalo, Petros S. Bithas, George P. Efthymoglou:
On the Impact of User Mobility on the Performance of Wireless Receivers. IEEE Access 8: 197300-197311 (2020) - [j35]Charalampos K. Armeniakos, Petros S. Bithas, Athanasios G. Kanatas:
SIR Analysis in 3D UAV Networks: A Stochastic Geometry Approach. IEEE Access 8: 204963-204973 (2020) - [j34]Petros S. Bithas, Viktor Nikolaidis, Athanasios G. Kanatas, George K. Karagiannidis:
UAV-to-Ground Communications: Channel Modeling and UAV Selection. IEEE Trans. Commun. 68(8): 5135-5144 (2020) - [i4]Petros S. Bithas, Viktor Nikolaidis, Athanasios G. Kanatas, George K. Karagiannidis:
UAV-to-Ground Communications: Channel Modeling and UAV Selection. CoRR abs/2004.13618 (2020)
2010 – 2019
- 2019
- [j33]Athanasios S. Lioumpas, Petros S. Bithas, Antonios Hatziefremidis:
Coordinated tethering for devices with multi-RAT capabilities: An algorithmic solution and performance analysis. Phys. Commun. 37 (2019) - [j32]Petros S. Bithas, Emmanouel T. Michailidis, Nikolaos Nomikos, Demosthenes Vouyioukas, Athanasios G. Kanatas:
A Survey on Machine-Learning Techniques for UAV-Based Communications. Sensors 19(23): 5170 (2019) - [j31]Emmanouel T. Michailidis, Nikolaos Nomikos, Petros S. Bithas, Demosthenes Vouyioukas, Athanasios G. Kanatas:
Optimal 3-D Aerial Relay Placement for Multi-User MIMO Communications. IEEE Trans. Aerosp. Electron. Syst. 55(6): 3218-3229 (2019) - [j30]Petros S. Bithas, Athanasios G. Kanatas, David W. Matolak:
Exploiting Shadowing Stationarity for Antenna Selection in V2V Communications. IEEE Trans. Veh. Technol. 68(2): 1607-1615 (2019) - [j29]Petros S. Bithas, Konstantinos N. Maliatsos, Fotis Foukalas:
An SINR-Aware Joint Mode Selection, Scheduling, and Resource Allocation Scheme for D2D Communications. IEEE Trans. Veh. Technol. 68(5): 4949-4963 (2019) - [j28]Petros S. Bithas, Athanasios G. Kanatas, Daniel B. da Costa, Prabhat K. Upadhyay, Antonios Hatziefremidis:
Novel Results for the Multivariate Ricean Distribution With Non-Identical Parameters. IEEE Trans. Veh. Technol. 68(5): 5129-5133 (2019) - [c27]Leonidas Marantis, Anastasios Paraskevopoulos, Dimitrios Rongas, Kontantinos Maliatsos, Petros S. Bithas, Athanasios G. Kanatas:
A Pattern Reconfigurable Antenna System Integrated in a Truck Side Mirror. MOCAST 2019: 1-5 - [c26]Petros S. Bithas, Viktor Nikolaidis, Athanasios G. Kanatas:
A New Shadowed Double-Scattering Model with Application to UAV-to-Ground Communications. WCNC 2019: 1-6 - 2018
- [j27]Vinay Bankey, Prabhat K. Upadhyay, Daniel Benevides da Costa, Petros S. Bithas, Athanasios G. Kanatas, Ugo Silva Dias:
Performance Analysis of Multi-Antenna Multiuser Hybrid Satellite-Terrestrial Relay Systems for Mobile Services Delivery. IEEE Access 6: 24729-24745 (2018) - [j26]Sourabh Solanki, Prabhat K. Upadhyay, Daniel Benevides da Costa, Petros S. Bithas, Athanasios G. Kanatas:
Performance Analysis of Cognitive Relay Networks With RF Hardware Impairments and CEEs in the Presence of Primary Users' Interference. IEEE Trans. Cogn. Commun. Netw. 4(2): 406-421 (2018) - [j25]Petros S. Bithas, Athanasios G. Kanatas, Daniel Benevides da Costa, Prabhat K. Upadhyay, Ugo Silva Dias:
On the Double-Generalized Gamma Statistics and Their Application to the Performance Analysis of V2V Communications. IEEE Trans. Commun. 66(1): 448-460 (2018) - [j24]Sourabh Solanki, Prabhat K. Upadhyay, Daniel Benevides da Costa, Petros S. Bithas, Athanasios G. Kanatas, Ugo Silva Dias:
Joint Impact of RF Hardware Impairments and Channel Estimation Errors in Spectrum Sharing Multiple-Relay Networks. IEEE Trans. Commun. 66(9): 3809-3824 (2018) - [j23]Petros S. Bithas, George P. Efthymoglou, Athanasios G. Kanatas:
V2V Cooperative Relaying Communications Under Interference and Outdated CSI. IEEE Trans. Veh. Technol. 67(4): 3466-3480 (2018) - [c25]Konstantinos N. Maliatsos, Leonidas Marantis, Petros S. Bithas, Athanasios G. Kanatas:
Diversity in Direct Mobile-to-Mobile Communication Systems: An Experimental Approach. GIIS 2018: 1-5 - [c24]Petros S. Bithas, Athanasios G. Kanatas, Daniel B. da Costa, Prabhat Kumar Upadhyay:
A Low Complexity Communication Technique for Mobile-to-Mobile Communication Systems. IWCMC 2018: 400-405 - [c23]Petros S. Bithas, Athanasios G. Kanatas, David W. Matolak:
Shadowing-Based Antenna Selection for V2V Communications. PIMRC 2018: 106-110 - 2017
- [j22]Yosbel R. Ortega, Prabhat K. Upadhyay, Daniel Benevides da Costa, Petros S. Bithas, Athanasios G. Kanatas, Ugo Silva Dias, Rafael Timóteo de Sousa Júnior:
Joint effect of jamming and noise on the secrecy outage performance of wiretap channels with feedback delay and multiple antennas. Trans. Emerg. Telecommun. Technol. 28(11) (2017) - [j21]Panagiotis G. Stavrianos, Petros S. Bithas, Dimitris S. Kalivas:
An analytical study for an efficient multi-branch switched diversity receiver. Int. J. Commun. Syst. 30(16) (2017) - [j20]Pankaj K. Sharma, Prabhat K. Upadhyay, Daniel Benevides da Costa, Petros S. Bithas, Athanasios G. Kanatas:
Performance Analysis of Overlay Spectrum Sharing in Hybrid Satellite-Terrestrial Systems With Secondary Network Selection. IEEE Trans. Wirel. Commun. 16(10): 6586-6601 (2017) - [c22]Petros S. Bithas, Athanasios G. Kanatas, Daniel Benevides da Costa, Prabhat K. Upadhyay, Ugo Silva Dias:
The Double-Generalized Gamma Distribution and Its Application to V2V Communications. GLOBECOM 2017: 1-6 - [c21]Sourabh Solanki, Pankaj K. Sharma, Prabhat K. Upadhyay, Daniel Benevides da Costa, Petros S. Bithas, Athanasios G. Kanatas:
Cognitive Multi-Relay Networks with RF Hardware Impairments and Channel Estimation Errors. GLOBECOM 2017: 1-6 - [c20]Petros S. Bithas, Athanasios G. Kanatas, Daniel Benevides da Costa, Prabhat Kumar Upadhyay:
Transmit antenna selection in vehicle-to-vehicle time-varying fading channels. ICC 2017: 1-6 - [c19]Pankaj K. Sharma, Prabhat K. Upadhyay, Daniel Benevides da Costa, Petros S. Bithas, Athanasios G. Kanatas:
Hybrid satellite-terrestrial spectrum sharing system with opportunistic secondary network selection. ICC 2017: 1-6 - [c18]Yosbel R. Ortega, Prabhat K. Upadhyay, Daniel Benevides da Costa, Petros S. Bithas, Athanasios G. Kanatas, Ugo Silva Dias, Rafael Timóteo de Sousa Júnior:
Joint effect of jamming and noise in wiretap channels with multiple antennas. IWCMC 2017: 1344-1349 - 2016
- [j19]Kostas P. Peppas, Petros S. Bithas, George P. Efthymoglou, Athanasios G. Kanatas:
Space Shift Keying Transmission for Intervehicular Communications. IEEE Trans. Intell. Transp. Syst. 17(12): 3635-3640 (2016) - [j18]Petros S. Bithas, Athanasios A. Rontogiannis, George K. Karagiannidis:
An Improved Threshold-Based Channel Selection Scheme for Wireless Communication Systems. IEEE Trans. Wirel. Commun. 15(2): 1531-1546 (2016) - [j17]Petros S. Bithas, Konstantinos N. Maliatsos, Athanasios G. Kanatas:
The Bivariate Double Rayleigh Distribution for Multichannel Time-Varying Systems. IEEE Wirel. Commun. Lett. 5(5): 524-527 (2016) - [j16]Petros S. Bithas, Athanasios A. Rontogiannis:
User selection scheme with limited feedback processing and outdated CSI in multiuser relay networks. Wirel. Commun. Mob. Comput. 16(16): 2700-2713 (2016) - [c17]Kostas P. Peppas, Petros S. Bithas, George P. Efthymoglou, Athanasios G. Kanatas:
Spatial Modulation for V2V and V2I Communications in a Multiple Scattering Environment. GLOBECOM 2016: 1-6 - [c16]Petros S. Bithas, George P. Efthymoglou, Athanasios G. Kanatas:
Intervehicular communication systems under co-channel interference and outdated channel estimates. ICC 2016: 1-6 - [c15]Petros S. Bithas, George P. Efthymoglou, Athanasios G. Kanatas:
A cooperative relay selection scheme in V2V communications under interference and outdated CSI. PIMRC 2016: 1-6 - [c14]Petros S. Bithas, Konstantinos N. Maliatsos, Athanasios G. Kanatas:
V2V Communication Systems under Correlated Double-Rayleigh Fading Channels. VTC Spring 2016: 1-5 - [c13]Petros S. Bithas, Antonis Aspreas, Athanasios G. Kanatas:
A new reconfigurable antenna scheme and its application to vehicle-to-vehicle communications. WiMob 2016: 1-6 - 2015
- [j15]Petros S. Bithas, Athanasios A. Rontogiannis:
Mobile Communication Systems in the Presence of Fading/Shadowing, Noise and Interference. IEEE Trans. Commun. 63(3): 724-737 (2015) - 2014
- [c12]Petros S. Bithas, Athanasios S. Lioumpas, Theodore Mouroutis, Yiannis Stylianou, George P. Efthymoglou:
Hybrid threshold-based selection diversity receivers for efficient resources utilization. CAMAD 2014: 178-182 - [c11]Petros S. Bithas, Athanasios S. Lioumpas, George K. Karagiannidis, Bayan S. Sharif:
Interference minimization in hybrid WiFi/cellular networks. CAMAD 2014: 198-202 - [c10]Petros S. Bithas, George P. Efthymoglou, Dimitris S. Kalivas:
Outage Probability of Cognitive Relay Networks Over Generalized Fading Channels with Interference Constraints. MoWNet 2014: 84-91 - [c9]Petros S. Bithas, Athanasios A. Rontogiannis:
Performance analysis of cooperative networks in shadowed fading with co-channel interference. PIMRC 2014: 381-385 - [c8]Petros S. Bithas, Athanasios A. Rontogiannis:
Analysis of Threshold-Based Selection Diversity Receivers. VTC Fall 2014: 1-5 - [c7]Petros S. Bithas, Athanasios A. Rontogiannis, Kostas Berberidis:
SINR analysis of cognitive underlay systems with multiple primary transceivers in Nakagami-m fading. WiMob 2014: 500-505 - [i3]Petros S. Bithas, Athanasios A. Rontogiannis:
Mobile Communication Systems in the Presence of Fading/Shadowing, Noise and Interference. CoRR abs/1406.4011 (2014) - 2013
- [j14]Petros S. Bithas, Athanasios S. Lioumpas, Angeliki Alexiou:
Mitigating shadowing effects through cluster-head cooperation techniques. IET Networks 2(2): 71-80 (2013) - [j13]Athanasios S. Lioumpas, Petros S. Bithas, Angeliki Alexiou:
Partitioning of Distributed MIMO Systems Based on Overhead Considerations. IEEE Wirel. Commun. Lett. 2(6): 579-582 (2013) - [c6]Petros S. Bithas, Athanasios A. Rontogiannis:
Performance analysis of mobile communication networks in the presence of composite fading, noise and interference. ISSPIT 2013: 52-57 - [i2]Petros S. Bithas, Athanasios S. Lioumpas, George K. Karagiannidis, Bayan S. Sharif:
Hybrid Cellular/WLAN with Wireless Offloading: Enabling Next Generation Wireless Networks. CoRR abs/1311.2970 (2013) - 2012
- [c5]Petros S. Bithas, Athanasios S. Lioumpas, Angeliki Alexiou:
A hybrid contention/reservation medium access protocol for Wireless Sensor Networks. GLOBECOM Workshops 2012: 1669-1674 - [c4]Petros S. Bithas, Athanasios S. Lioumpas, Angeliki Alexiou:
Enhancing the efficiency of cluster-based networks through MISO techniques. WCNC Workshops 2012: 243-247 - [i1]Athanasios S. Lioumpas, Petros S. Bithas, Angeliki Alexiou:
Partitioning of Distributed MIMO Systems based on Overhead Considerations. CoRR abs/1211.3719 (2012) - 2011
- [j12]Petros S. Bithas, Nikos C. Sagias, Ranjan K. Mallik:
On the Sum of Kappa Stochastic Variates and Applications to Equal-Gain Combining. IEEE Trans. Commun. 59(9): 2434-2442 (2011) - 2010
- [j11]Petros S. Bithas, George P. Efthymoglou, Nikos C. Sagias:
Spectral efficiency of adaptive transmission and selection diversity on generalised fading channels. IET Commun. 4(17): 2058-2064 (2010)
2000 – 2009
- 2009
- [j10]Petros S. Bithas, Nikos C. Sagias, P. Takis Mathiopoulos:
The bivariate generalized-Kappa (KappaG) distribution and its application to diversity receivers. IEEE Trans. Commun. 57(9): 2655-2662 (2009) - [j9]Petros S. Bithas, P. Takis Mathiopoulos:
Capacity of Correlated Generalized Gamma Fading With Dual-Branch Selection Diversity. IEEE Trans. Veh. Technol. 58(9): 5258-5663 (2009) - 2008
- [j8]Petros S. Bithas, Nikos C. Sagias, Theodoros A. Tsiftsis:
Performance analysis of dual-diversity receivers over correlated generalised Gamma fading channels. IET Commun. 2(1): 174-178 (2008) - [j7]Petros S. Bithas, Nikos C. Sagias, P. Takis Mathiopoulos, Stavros A. Kotsopoulos, Andreas M. Maras:
On the Correlated -Distribution With Arbitrary Fading Parameters. IEEE Signal Process. Lett. 15: 541-544 (2008) - [c3]Petros S. Bithas, P. Takis Mathiopoulos, Stavros A. Kotsopoulos:
On the Capacity of Generalized Fading/Shadowing Channels. VTC Fall 2008: 1-5 - 2007
- [j6]Petros S. Bithas, P. Takis Mathiopoulos:
Performance Analysis of SSC Diversity Receivers over Correlated Ricean Fading Satellite Channels. EURASIP J. Wirel. Commun. Netw. 2007 (2007) - [j5]Petros S. Bithas, Nikos C. Sagias, P. Takis Mathiopoulos:
GSC diversity receivers over generalized-gamma fading channels. IEEE Commun. Lett. 11(12): 964-966 (2007) - [j4]Petros S. Bithas, Nikos C. Sagias, P. Takis Mathiopoulos:
Dual diversity over correlated Ricean fading channels. J. Commun. Networks 9(1): 67-74 (2007) - [j3]Petros S. Bithas, P. Takis Mathiopoulos, Stavros A. Kotsopoulos:
Diversity reception over generalized-K (KG) fading channels. IEEE Trans. Wirel. Commun. 6(12): 4238-4243 (2007) - 2006
- [j2]Petros S. Bithas, Nikos C. Sagias, P. Takis Mathiopoulos, George K. Karagiannidis, Athanasios A. Rontogiannis:
On the performance analysis of digital communications over generalized-K fading channels. IEEE Commun. Lett. 10(5): 353-355 (2006) - 2005
- [j1]Petros S. Bithas, George K. Karagiannidis, Nikos C. Sagias, P. Takis Mathiopoulos, Stavros A. Kotsopoulos, Giovanni Emanuele Corazza:
Performance analysis of a class of GSC receivers over nonidentical Weibull fading channels. IEEE Trans. Veh. Technol. 54(6): 1963-1970 (2005) - [c2]Petros S. Bithas, Nikolaos C. Sagias, P. Takis Mathiopoulos, George K. Karagiannidis, Athanasios A. Rontogiannis:
Digital Communications over Generalized-K Fading Channels. ISWCS 2005: 684-687 - [c1]Nikolaos C. Sagias, P. Takis Mathiopoulos, Petros S. Bithas, George K. Karagiannidis:
On the Distribution of the Sum of Generalized Gamma Variates and Applications to Satellite Digital Communications. ISWCS 2005: 785-789
Coauthor Index
manage site settings
To protect your privacy, all features that rely on external API calls from your browser are turned off by default. You need to opt-in for them to become active. All settings here will be stored as cookies with your web browser. For more information see our F.A.Q.
Unpaywalled article links
Add open access links from to the list of external document links (if available).
Privacy notice: By enabling the option above, your browser will contact the API of unpaywall.org to load hyperlinks to open access articles. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the Unpaywall privacy policy.
Archived links via Wayback Machine
For web page which are no longer available, try to retrieve content from the of the Internet Archive (if available).
Privacy notice: By enabling the option above, your browser will contact the API of archive.org to check for archived content of web pages that are no longer available. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the Internet Archive privacy policy.
Reference lists
Add a list of references from , , and to record detail pages.
load references from crossref.org and opencitations.net
Privacy notice: By enabling the option above, your browser will contact the APIs of crossref.org, opencitations.net, and semanticscholar.org to load article reference information. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the Crossref privacy policy and the OpenCitations privacy policy, as well as the AI2 Privacy Policy covering Semantic Scholar.
Citation data
Add a list of citing articles from and to record detail pages.
load citations from opencitations.net
Privacy notice: By enabling the option above, your browser will contact the API of opencitations.net and semanticscholar.org to load citation information. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the OpenCitations privacy policy as well as the AI2 Privacy Policy covering Semantic Scholar.
OpenAlex data
Load additional information about publications from .
Privacy notice: By enabling the option above, your browser will contact the API of openalex.org to load additional information. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the information given by OpenAlex.
last updated on 2024-10-14 23:32 CEST by the dblp team
all metadata released as open data under CC0 1.0 license
see also: Terms of Use | Privacy Policy | Imprint