Authors: Li, Zhao Xiang

Citation: Li, Zhao Xiang, The cycle structure for directed graphs on surfaces, Acta mathematica Sinica. English series (Print) , 31(1), 2015, pp. 170-176

Authors: Li, Zhao Xiang Ren, Han

Citation: Li, Zhao Xiang et Ren, Han, Minimum genus embeddings of the complete graph, Acta mathematica Sinica. English series (Print) , 32(10), 2016, pp. 1246-1254

Authors: Li, Zhao Xiang He, Wei

Citation: Li, Zhao Xiang et He, Wei, Chromatic sums of nonseparable near-triangulations on the projective plane, Acta mathematica Sinica. English series (Print) , 28(11), 2012, pp. 2185-2196