中国科学院数学与系统科学研究院期刊网
On Total Progeny of Multitype Galton-Watson Process and the First Passage Time of Random Walk on Lattice
Hua Ming WANG
Acta Mathematica Sinica . 2014, (12): 2161 -2172 .  DOI: 10.1007/s10114-014-3650-1