%0 Journal Article %A Džurina, Jozef %T Oscillation criteria for second order nonlinear retarded differential equations %J Mathematica slovaca %D 2004 %P 245-253 %V 54 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_2004__54_3_a4/ %G en %F MASLO_2004__54_3_a4