Cocepts and Results in the Development of a Hybrid Tracking System for Computer Aided Surgery. - Wolfgang Birkfellner; Franz Watzinger; Felix Wanschitz; Georg Enislidis; Michael Truppe; Rolf Ewers; Helmar Bergmann (MICCAI, 1998)

Computed Navigation in Cranio-Maxillo-Facial and Oral Head and Neck Surgery: Principles, Indications and Potentials for Telepresence and Teleassistance. - Arne Wagner; Werner Millesi; Franz Watzinger; Michael Truppe; Michael Rasse; Georg Enislidis; Christian Kermer; Rolf Ewers (Virtual Reality: Cognitive Foundations, Technological Issues & Philosophical Implications, 2001)