中国科学院数学与系统科学研究院期刊网
AMS
On 2-Factors with Prescribed Properties in a Bipartite Graph
Jin YAN, Gui Zhen LIU
Acta Mathematica Sinica . 2006, (4): 1115 -1120 .  DOI: 10.1007/s10114-005-0666-6