TY - JOUR AU - Regenda, Ján TI - Oscillatory and nonoscillatory properties of solutions of the differential equation $y^{(4)}+P(t)y"+Q(t)y=0$ JO - Mathematica slovaca PY - 1978 SP - 329 EP - 342 VL - 28 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MASLO_1978__28_4_a0/ LA - en ID - MASLO_1978__28_4_a0 ER -