In this paper, we extend the idea of magic labeling to directed graphs. In particular, a magic labeling of a digraph is the directed analog of a vertex-magic total labeling. Some elementary results are obtained and some infinite families of magic digraph labelings are exhibited.
Citation
G. S. Bloom, Alison Marr, W. D. Wallis. Magic Digraphs[J], Journal of Combinatorial Mathematics and Combinatorial Computing, Volume 065. 205-212. .