中国科学院数学与系统科学研究院期刊网
AMS
On the Monotonicity of the Speed of Random Walks on a Percolation Cluster of Trees
Da Yue CHEN, Fu Xi ZHANG
Acta Mathematica Sinica . 2007, (11): 1949 -1954 .  DOI: 10.1007/s10114-007-0975-z