http://personprofil.aau.dk/profil/121021 (current page at Aalborg Universitetet)

http://wwwcg.in.tum.de/group/persons/kraus.html (former page at TU München)

http://www.vis.uni-stuttgart.de/~kraus/ (former page at the Universität Stuttgart)

http://www.ecn.purdue.edu/purpl/people/kraus.htm (former page at Purdue University)