TY - JOUR AU - D. V. Izyumova TI - Conditions for the oscillatory and non-oscillatory nature of non-linear differential equations of second order JO - Differencialʹnye uravneniâ PY - 1966 SP - 1572 EP - 1586 VL - 2 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1966_2_12_a3/ LA - ru ID - DE_1966_2_12_a3 ER -