Dücker M, Müller W, Rubart J. Innovative Concepts for Configurating Shared Workspaces through Visual Programming. In: 10.1109/HICSS.1999.773046__Proceedings of the 32nd Annual Hawaii International Conference on Systems Sciences. ; 1999. doi:10.1109/HICSS.1999.773046

Geiger C, Lehrenfeld G, Müller W. Visual Specification, Modeling, and Illustrations of Complex Systems. In: Proceedings of HICSS-32. ; 1999. doi:10.1109/HICSS.1999.772621