3D fixations in real and virtual scenarios
In: Journal of Eye Movement Research, Jg. 1 H. 5 (Special issue: Abstracts of the ECEM 2007), S. 13 ff.2007




Contract-net-based learning in a user-adaptive interface agency
In: Distributed Artificial Intelligence Meets Machine Learning - Learning in Multi-Agent Environments, Jg. 1221, S. 202-2221997
Evaluation of binocular eye trackers and algorithms for 3D gaze interaction in virtual reality environments
In: JVRB - Journal of Virtual Reality and Broadcasting, Jg. 5 H. 16, S. 1660 ff.2008









Order and equivalence of rational numbers: a cognitive analysis
In: Journal for research in mathematics education, Jg. 16 H. 1, S. 18-361985
Order and equivalence of rational numbers: a clinical teaching experiment
In: Journal for research in mathematics education, Jg. 15 H. 5, S. 323-3411984

Processing iconic gestures in a multimodal virtual construction environment
In: Gesture-Based Human-Computer Interaction and Simulation, Jg. 5085, S. 187-1922009