TY - JOUR AU - V. I. Afanas'ev TI - On functions of a random walk up to the hitting the negative half-axis JO - Teoriâ veroâtnostej i ee primeneniâ PY - 1986 SP - 773 EP - 777 VL - 31 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TVP_1986_31_4_a9/ LA - ru ID - TVP_1986_31_4_a9 ER -