Simon Harper, Helen Ashman, Mark Bernstein, Alexandra I. Cristea, Hugh C. Davis, Paul De Bra, Vicki L. Hanson, David E. Millard: HYPERTEXT 2007, Proceedings of the 18th ACM Conference on Hypertext and Hypermedia, September 10-12, 2007, Manchester, UK. ACM 2007, ISBN 978-1-59593-820-6