Mean first-passage time for random walks on undirected networksZhongzhi Zhang, Alafate Julaiti, Baoyu Hou, Hongjuan Zhang and Guanrong ChenEur. Phys. J. B, 84 4 (2011) 691-697DOI: https://doi.org/10.1140/epjb/e2011-20834-1