中国科学院数学与系统科学研究院期刊网
AMS
f-Class Two Graphs Whose f-Cores Have Maximum Degree Two
Xia ZHANG, Gui Ying YAN, Jian Sheng CAI
Acta Mathematica Sinica . 2014, (4): 601 -608 .  DOI: 10.1007/s10114-014-3145-0