中国科学院数学与系统科学研究院期刊网
AMS
On Product-Cordial Index Sets and Friendly Index Sets of 2-Regular Graphs and Generalized Wheels
Harris KWONG, Sin Min LEE, Ho Kuen NG
Acta Mathematica Sinica . 2012, (4): 661 -674 .  DOI: 10.1007/s10114-011-0515-8