Analysis of Algorithms for Listing Equivalence Classes of <i>k</i>-ary Strings.

Andrzej Proskurowski Frank Ruskey Malcolm Smith Analysis of Algorithms for Listing Equivalence Classes of <i>k</i>-ary Strings. 94-109 1998 11 SIAM J. Discrete Math. 1 http://epubs.siam.org/sam-bin/dbq/article/23400 db/journals/siamdm/siamdm11.html#ProskurowskiRS98