Additive Distances and Quasi-Distances Between Words.

Cristian Calude Kai Salomaa Sheng Yu Additive Distances and Quasi-Distances Between Words. 141-152 2002 8 J. UCS 2 http://www.jucs.org/jucs_8_2/additive_distances_and_quasi db/journals/jucs/jucs8.html#CaludeSY02a