The signed (k, k)-domatic number of digraphs
Math. Commun. 17 (2012), no. 1-2, 537-546.
BibTex references
@Article\{VS12a,
author = "Volkmann, Lutz and Sheikholeslami, S.M.",
title = "The signed (k, k)-domatic number of digraphs",
journal = "Math. Commun.",
number = "1-2",
volume = "17",
pages = "537-546",
year = "2012",
}