Roman reinforcement numbers of digraphs
J. Combin. Math. Combin. Comput. 89 (2014), 53-64.
BibTex references
@Article\{DMSV14,
author = "Dehgardi, N. and Meierling, Dirk and Sheikholeslami, S.M. and Volkmann, Lutz",
title = "Roman reinforcement numbers of digraphs",
journal = "J. Combin. Math. Combin. Comput.",
volume = "89",
pages = "53-64",
year = "2014",
}