G. Styliaras, und S. Christodoulou. HT '09: Proceedings of the Twentieth ACM Conference on Hypertext and Hypermedia, New York, NY, USA, ACM, (Juli 2009)
B. Steichen, S. Lawless, A. O'Connor, und V. Wade. HT '09: Proceedings of the Twentieth ACM Conference on Hypertext and Hypermedia, New York, NY, USA, ACM, (Juli 2009)