Symmetry breaking in graphs. Albertson, Michael O.; Collins, Karen L. — 1996 The Electronic Journal of Combinatorics [electronic only]
The distinguishing chromatic number. Collins, Karen L.; Trenk, Ann N. — 2006 The Electronic Journal of Combinatorics [electronic only]
Bounds on the distinguishing chromatic number. Collins, Karen L.; Hovey, Mark; Trenk, Ann N. — 2009 The Electronic Journal of Combinatorics [electronic only]