NOTE ON UPPER BOUND SIGNED 2-INDEPENDENCE IN DIGRAPHS |
Kim, Hye Kyung (Department of Mathematics Education, Catholic University of Daegu) |
1 | G. Chartrand and L. Lesniak, Graphs and digraphs, 4th ed. Chapman and Hall, Boca Raton, 2005. |
2 | M. A. Henning, Signed 2-independence in graphs, Discrete Math. 250 (2002), 93-107. DOI ScienceOn |
3 | L. Volkmann, Signed 2-independence in digraphs, Discrete. Math. 312 (2012), 465-471. DOI ScienceOn |
4 | B. Zelinka, On signed 2-independence numbers of graphs, Manuscript. |
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