Li, Shuchao; Zhou, Huiling; Feng, Yanqin Solution to an open problem on the integral sum graphs. (English) Zbl 1121.05103 Vietnam J. Math. 34, No. 3, 285-294 (2006). Reviewer: D. V. Chopra (Wichita) MSC: 05C78 05C38 PDFBibTeX XMLCite \textit{S. Li} et al., Vietnam J. Math. 34, No. 3, 285--294 (2006; Zbl 1121.05103)
Li, Shuchao; Feng, Yanqin A note on independence systems and matroids. (English) Zbl 1064.05038 Vietnam J. Math. 32, No. 2, 155-160 (2004). MSC: 05B35 PDFBibTeX XMLCite \textit{S. Li} and \textit{Y. Feng}, Vietnam J. Math. 32, No. 2, 155--160 (2004; Zbl 1064.05038)