M. Bruckschen, R. Vieira, and S. Rigo. HT '09: Proceedings of the Twentieth ACM Conference on Hypertext and Hypermedia, New York, NY, USA, ACM, (July 2009)
L. Denoue, J. Adcock, S. Carter, and G. Golovchinsky. HT '09: Proceedings of the Twentieth ACM Conference on Hypertext and Hypermedia, New York, NY, USA, ACM, (July 2009)