Shuzhi Sam Ge, Oussama Khatib, John-John Cabibihan, Reid G. Simmons, Mary-Anne Williams: Social Robotics - 4th International Conference, ICSR 2012, Chengdu, China, October 29-31, 2012. Proceedings. Lecture Notes in Computer Science 7621, Springer 2012, ISBN 978-3-642-34102-1