T. Illetschko, A. Ion, Y. Haxhimusa, W. Kropatsch:
"Collapsing 3D Combinatorial Maps";
Talk: 30th Workshop of the AAPR, Obergurgl; 2006-03-02 - 2006-03-03; in: "Digital Imaging and Pattern Recognition", OCG, (2006), ISBN: 3-85403-209-9; 85 - 93.
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC06586947