TY - JOUR AU - Yu. K. Belyaev TI - On the number of boundary out-crossings of a~region by a~vector stochastic process JO - Teoriâ veroâtnostej i ee primeneniâ PY - 1968 SP - 333 EP - 337 VL - 13 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TVP_1968_13_2_a10/ LA - ru ID - TVP_1968_13_2_a10 ER -