A Nordhaus-Gaddum-type result for the 2-domination number
J. Combin. Math. Combin. Comput. 64 (2008), 227--235.
BibTex references
@Article\{Vol08b,
author = "Volkmann, Lutz",
title = "A Nordhaus-Gaddum-type result for the 2-domination number",
journal = "J. Combin. Math. Combin. Comput.",
volume = "64",
pages = "227--235",
year = "2008",
}