The Roman domatic number of a graph
Appl. Math. Lett. 23 (2010), 1295--1300.
BibTex references
@Article\{SV10c,
author = "Sheikholeslami, S.M. and Volkmann, Lutz",
title = "The Roman domatic number of a graph",
journal = "Appl. Math. Lett.",
volume = "23",
pages = "1295--1300",
year = "2010",
}