Frank Allan Hansen. Ubiquitous annotation systems: technologies and challenges. In Uffe Kock Wiil, Peter J. Nürnberg, Jessica Rubart, editors, HYPERTEXT 2006, Proceedings of the 17th ACM Conference on Hypertext and Hypermedia, August 22-25, 2006, Odense, Denmark. pages 121-132, ACM, 2006. [doi]
Abstract is missing.