Visual-Textual Prototyping of 4D Scenes
M. Dücker, C. Geiger, R. Hunstock, G. Lehrenfeld, W. Müller, in: Proceedings of the 1997 IEEE Symposium on Visual Languages, Capri, Italy, 1997.

Integrating a Constraint Solver into a Real-Time Animation Environment
P. Griebel, G. Lehrenfeld, W. Müller, C. Tahedl, H. Uhr, in: Proceedings of the 1996 IEEE Symposium on Visual Languages, Boulder CO, 1996.