@article{TVP_1968_13_3_a12,
     author = {V. N. Tutubalin},
     title = {On random walk in {Lobachevsky's} plane},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {512--517},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TVP_1968_13_3_a12/}
}