The following publications are possibly variants of this publication:
- A Head-Mounted Operating Binocular for Augmented Reality Visualization in Medicine - Design and Initial EvaluationWolfgang Birkfellner, Michael Figl, Klaus Huber, Franz Watzinger, Felix Wanschitz, Johann Hummel, Rudolf Hanel, Wolfgang Greimel, Peter Homolka, Rolf Ewers, Helmar Bergmann. tmi, 21(8):991-997, 2002.
- Automatic calibration of an optical see-through head-mounted display for augmented reality applications in computer-assisted interventionsMichael Figl, Christopher Ede, Wolfgang Birkfellner, Johann Hummel, Rudolf Seemann, Helmar Bergmann. miigp 2004: [doi]
- Calibration of a head-mounted operating microscope for augmented reality visualization in CASWolfgang Birkfellner, Michael Figl, Klaus Huber, Franz Watzinger, Felix Wanschitz, Rudolf Hanel, Johann Hummel, Rolf Ewers, Helmar Bergmann. cars 2001: 154-159
- The Control Unit for a Head Mounted Operating Microscope Used for Augmented Reality Visualization in Computer Aided SugeryMichael Figl, Wolfgang Birkfellner, Christopher Ede, Johann Hummel, Rudolf Hanel, Franz Watzinger, Felix Wanschitz, Rolf Ewers, Helmar Bergmann. ismar 2002: 69-75 [doi]