%0 Journal Article %A MaruĊĦiak, Pavol %T On the oscillation of nonlinear differential systems with retarded arguments %J Mathematica slovaca %D 1984 %P 73-88 %V 34 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1984__34_1_a4/ %G en %F MASLO_1984__34_1_a4