Wang, Haichao; Kim, Hye Kyung Signed 2-independence of the Cartesian product of directed cycles. (English) Zbl 1435.05097 Proc. Jangjeon Math. Soc. 22, No. 4, 609-624 (2019). MSC: 05C20 05C22 05C76 05C69 05C38 PDFBibTeX XMLCite \textit{H. Wang} and \textit{H. K. Kim}, Proc. Jangjeon Math. Soc. 22, No. 4, 609--624 (2019; Zbl 1435.05097)
Crevals, Simon; Wang, Haichao; Kim, Hye Kyung; Baek, Hunki Domination number of the directed cylinder. (English) Zbl 1309.05133 Australas. J. Comb. 61, Part 3, 192-209 (2015). MSC: 05C69 05C76 05C38 PDFBibTeX XMLCite \textit{S. Crevals} et al., Australas. J. Comb. 61, Part 3, 192--209 (2015; Zbl 1309.05133) Full Text: Link
Wang, Haichao; Kim, Hye Kyung Signed 2-independence of Cartesian product of directed paths. (English) Zbl 1302.05136 Int. J. Comput. Math. 91, No. 6, 1190-1201 (2014). MSC: 05C69 05C20 05C38 PDFBibTeX XMLCite \textit{H. Wang} and \textit{H. K. Kim}, Int. J. Comput. Math. 91, No. 6, 1190--1201 (2014; Zbl 1302.05136) Full Text: DOI
Wang, Haichao; Kim, Hye Kyung Signed 2-independence of Cartesian product of directed cycles and paths. (English) Zbl 1278.05202 Util. Math. 90, 297-306 (2013). MSC: 05C76 05C69 05C38 05C22 PDFBibTeX XMLCite \textit{H. Wang} and \textit{H. K. Kim}, Util. Math. 90, 297--306 (2013; Zbl 1278.05202)
Kim, Hye Kyung Note on upper bound signed 2-independence in digraphs. (English) Zbl 1271.05075 East Asian Math. J. 28, No. 5, 579-585 (2012). MSC: 05C69 05C22 05C20 PDFBibTeX XMLCite \textit{H. K. Kim}, East Asian Math. J. 28, No. 5, 579--585 (2012; Zbl 1271.05075) Full Text: DOI