Signed total 2-independence in digraphs
Util. Math. 104 (2017), 295--306.
BibTex references
@Article\{Vol17e,
author = "Volkmann, Lutz",
title = "Signed total 2-independence in digraphs",
journal = "Util. Math.",
volume = "104",
pages = "295--306",
year = "2017",
note = "http://publications.rwth-aachen.de/record/706860",
}