A. Rukzio. Invited paper special session "Simplification of user access to ubiquitous ICT services" in Wireless Personal Multimedia Communication (WPMC'05), Aalborg, Denmark, (September 2005)
E. Rukzio, K. Leichtenstern, and V. Callaghan. 8th International Conference on Ubiquitous Computing, UbiComp 2006, Orange County, California, (September 2006)