Steffen Oeltze Helmut Doleisch Helwig Hauser Philipp Muigg Bernhard Preim 1392-1399 2007 13 IEEE Trans. Vis. Comput. Graph. 6 http://doi.ieeecomputersociety.org/10.1109/TVCG.2007.70569 db/journals/tvcg/tvcg13.html#OeltzeDHMP07