中国科学院数学与系统科学研究院期刊网
AMS
List Total Colorings of Planar Graphs without Triangles at Small Distance
Bin LIU, Jian Feng HOU, Gui Zhen LIU
Acta Mathematica Sinica . 2011, (12): 2437 -2444 .  DOI: 10.1007/s10114-011-9154-3