TY - JOUR AU - A. I. Koshelev TI - Smoothness of the solutions of some nonlinear boundary value JO - Doklady Akademii Nauk PY - 1988 SP - 26 EP - 28 VL - 298 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1988_298_1_a4/ LA - ru ID - DAN_1988_298_1_a4 ER -