Cyberguide: prototyping context-aware mobile applications. - Sue Long; Dietmar Aust; Gregory D. Abowd; Christopher G. Atkeson (CHI Conference Companion, 1996)

PaperLink: A Technique for Hyperlinking from Real Paper to Electronic Content. - Toshifumi Arai; Dietmar Aust; Scott E. Hudson (CHI, 1997)