The double Roman domatic number of a graph
J. Combin. Math. Combin. Comput. 104 (2018), 205--215.
BibTex references
@Article\{Vol18,
author = "Volkmann, Lutz",
title = "The double Roman domatic number of a graph",
journal = "J. Combin. Math. Combin. Comput.",
volume = "104",
pages = "205--215",
year = "2018",
}