@article{10_4153_CJM_2004_044_4,
     author = {Ishiwata, Satoshi},
     title = {A {Berry-Esseen} {Type} {Theorem} on {Nilpotent} {Covering} {Graphs}},
     journal = {Canadian journal of mathematics},
     pages = {963--982},
     year = {2004},
     volume = {56},
     number = {5},
     doi = {10.4153/CJM-2004-044-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2004-044-4/}
}