%0 Journal Article %A Fečkan, Michal %T Existence results for implicit differential equations %J Mathematica slovaca %D 1998 %P 35-42 %V 48 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1998__48_1_a2/ %G en %F MASLO_1998__48_1_a2