%0 Journal Article %A Vosmanský, Jaromír %T Monotonic properties of zeros and extremants of the differential equation $y''+q(t)y=0$ %J Archivum mathematicum %D 1970 %P 37-74 %V 06 %N 1 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/ARM_1970__6_1_a3/ %G en %F ARM_1970__6_1_a3