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L. Caccetta and R. H?ggkvist, “On Minimal Digraphs with Given Girth,” Proceedings of the 9th Southeast Conference on Combinatorics, Graph Theory, and Computing, Boca Raton, 1978, pp. 181-187.

has been cited by the following article:

• TITLE: A Note on Directed 5-Cycles in Digraphs

  AUTHORS: Hao Liang, Junming Xu

  KEYWORDS: Digraph; Directed Cycle

  JOURNAL NAME: Applied Mathematics, Vol.3 No.7, June 21, 2012

  ABSTRACT: In this note, it is proved that if α≥0.24817, then any digraph on n vertices with minimum outdegree at least αn contains a directed cycle of length at most 5.