Balanced regular coverings of a signed graph and regular branched orientable surface coverings over a non-orientable surface

Jin Ho Kwak, Jaeun Lee, Young-hee Shin. Balanced regular coverings of a signed graph and regular branched orientable surface coverings over a non-orientable surface. Discrete Mathematics, 275(1-3):177-193, 2004. [doi]

Abstract

Abstract is missing.