Evan C. Sherbrooke Nicholas M. Patrikalakis Erik Brisson An Algorithm for the Medial Axis Transform of 3D Polyhedral Solids. 44-61 1996 2 IEEE Trans. Vis. Comput. Graph. 1 http://www.computer.org/tvcg/tg1996/v0044abs.htm db/journals/tvcg/tvcg2.html#SherbrookePB96