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Zhao, Likuan; Liu, Bing A generalization on the kissing number of square. (Chinese. English summary) Zbl 1274.05062 J. Qufu Norm. Univ., Nat. Sci. 38, No. 4, 1-3 (2012). MSC: 05B40 52C17 PDFBibTeX XMLCite \textit{L. Zhao} and \textit{B. Liu}, J. Qufu Norm. Univ., Nat. Sci. 38, No. 4, 1--3 (2012; Zbl 1274.05062)