Twin signed Roman domination numbers in directed graphs
Tamkang J. Math. 47 (2016), 357--371.
BibTex references
@Article\{BSV16,
author = "Bodaghli, Asghar and Sheikholeslami, S.M. and Volkmann, Lutz",
title = "Twin signed Roman domination numbers in directed graphs",
journal = "Tamkang J. Math.",
volume = "47",
pages = "357--371",
year = "2016",
}