A tree-edit-distance algorithm for comparing simple, closed shapes.

Philip N. Klein Srikanta Tirthapura Daniel Sharvit Benjamin B. Kimia A tree-edit-distance algorithm for comparing simple, closed shapes. 696-704 2000 conf/soda/2000 SODA http://dl.acm.org/citation.cfm?id=338219.338628 db/conf/soda/soda2000.html#KleinTSK00