@article{DAN_1985_280_5_a5,
     author = {V. A. Kaimanovich},
     title = {An entropy criterion for maximality of the boundary of random walks on discrete groups},
     journal = {Doklady Akademii Nauk},
     pages = {1051--1054},
     year = {1985},
     volume = {280},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_280_5_a5/}
}