TY - JOUR AU - V. Ya. Derr TI - Sufficient conditions for the nonoscillation of a~second-order equation with respect to a~functional JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1986 SP - 21 EP - 26 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1986_12_a4/ LA - ru ID - IVM_1986_12_a4 ER -