TY - JOUR AU - Háčik, Miloš TI - Higher monotonicity properties of zero points of the linear combination of the solution and its first derivative of the differential equation $y''+q(t)y=0$ JO - Archivum mathematicum PY - 1974 SP - 67 EP - 77 VL - 10 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ARM_1974__10_2_a0/ LA - en ID - ARM_1974__10_2_a0 ER -