Kaleem Siddiqi Juan Zhang Diego Macrini Ali Shokoufandeh Sylvain Bouix Sven J. Dickinson Retrieving articulated 3-D models using medial surfaces. 261-275 2008 19 Mach. Vis. Appl. 4 http://dx.doi.org/10.1007/s00138-007-0097-8 db/journals/mva/mva19.html#SiddiqiZMSBD08