The signed Roman domatic number of a digraph
Electron J. Graph Theory Appl. 3 (2015), 85-93.
BibTex references
@Article\{SV15,
author = "Sheikholeslami, S.M. and Volkmann, Lutz",
title = "The signed Roman domatic number of a digraph",
journal = "Electron J. Graph Theory Appl.",
volume = "3",
pages = "85-93",
year = "2015",
}