A generalization of a result of Häggkvist and Nicoghossian

Douglas Bauer, Hajo Broersma, Henk Jan Veldman, Li Rao. A generalization of a result of Häggkvist and Nicoghossian. Journal of Combinatorial Theory, Series A, 47(2):237-243, 1989. [doi]

Abstract

Abstract is missing.