Lu, Jinbu; Liu, Linzhong On the study of total signed domination function of graphs. (English) Zbl 0983.05062 J. Lanzhou Railw. Univ., Nat. Sci. 20, No. 1, 95-97 (2001). MSC: 05C69 PDFBibTeX XMLCite \textit{J. Lu} and \textit{L. Liu}, J. Lanzhou Railw. Univ., Nat. Sci. 20, No. 1, 95--97 (2001; Zbl 0983.05062)
Liu, Linzhong; Li, Jingwen; Zhang, Zhongfu The Hopfield neural network model and algorithm for domination numbers of graphs. (Chinese. English summary) Zbl 0986.05082 J. Lanzhou Railw. Univ., Nat. Sci. 19, No. 6, 94-95 (2000). MSC: 05C69 68R10 PDFBibTeX XMLCite \textit{L. Liu} et al., J. Lanzhou Railw. Univ., Nat. Sci. 19, No. 6, 94--95 (2000; Zbl 0986.05082)
Liu, Linzhong; Li, Jingwen; Zhang, Zhongfu A note on the neural network model for cover numbers of graphs. (Chinese. English summary) Zbl 0987.05082 J. Lanzhou Railw. Univ., Nat. Sci. 19, No. 3, 86-87 (2000). MSC: 05C70 PDFBibTeX XMLCite \textit{L. Liu} et al., J. Lanzhou Railw. Univ., Nat. Sci. 19, No. 3, 86--87 (2000; Zbl 0987.05082)
Zhang, Zhongfu; Liu, Linzhong On some problems of integer flows. (Chinese. English summary) Zbl 0983.05048 J. Lanzhou Railw. Univ., Nat. Sci. 19, No. 4, 39-41 (2000). MSC: 05C20 90B10 PDFBibTeX XMLCite \textit{Z. Zhang} and \textit{L. Liu}, J. Lanzhou Railw. Univ., Nat. Sci. 19, No. 4, 39--41 (2000; Zbl 0983.05048)