中国科学院数学与系统科学研究院期刊网
Several Classes of Upper Bounds for the Laplacian Spectral Radius of a Graph
叶圣奎;陈胜;
Acta Mathematica Sinica, Chinese Series . 2008, (2): 235 -240 .  DOI: 10.12386/A2008sxxb0028