中国科学院数学与系统科学研究院期刊网
The Ordering of Bicyclic Graphs by Their Spectral Radii
Xing Ke WANG, Shang Wang TAN
Acta Mathematica Sinica, Chinese Series . 2010, (3): 469 -476 .  DOI: 10.12386/A2010sxxb0052