TY - JOUR AU - N. V. Krylov TI - The problem with two free boundaries for an elliptic equation and the optimal stopping of a Markov process JO - Doklady Akademii Nauk PY - 1970 SP - 1263 EP - 1265 VL - 194 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1970_194_6_a4/ LA - ru ID - DAN_1970_194_6_a4 ER -