@article{TVP_1986_31_4_a9,
     author = {V. I. Afanas'ev},
     title = {On functions of a random walk up to the hitting the negative half-axis},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {773--777},
     publisher = {mathdoc},
     volume = {31},
     number = {4},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TVP_1986_31_4_a9/}
}