Scalable System for 3D Audio Raytracing
W. Müller, F. Ullmann, in:  Proceedings IEEE International Conference on Multimedia Computing and Systems, Florence, Italy, 1999.

VIPspace - A Visually Programmable Shared Workspace
M. Dücker, W. Müller, J. Rubart, in:  Proceedings. 1998 IEEE Symposium on Visual Languages , Halifax, NS, Canada , 1998.