TY - JOUR AU - G. A. Kamenskii TI - A two-point boundary-value problem for a non-linear second-order differential equation and mean-value theorems JO - Doklady Akademii Nauk PY - 1961 SP - 541 EP - 543 VL - 139 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1961_139_3_a6/ LA - ru ID - DAN_1961_139_3_a6 ER -