Symmetry-Based Indexing of Image Databases. - Daniel Sharvit; Jacky Chan; Hüseyin Tek; Benjamin B. Kimia (J. Vis. Commun. Image Represent., 1998)

A tree-edit-distance algorithm for comparing simple, closed shapes. - Philip N. Klein; Srikanta Tirthapura; Daniel Sharvit; Benjamin B. Kimia (SODA, 2000)