%0 Journal Article
%A Oláh, Rudolf
%T On positive solutions of nonlinear retarded differential equations
%J Mathematica slovaca
%D 1992
%P 201-210
%V 42
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MASLO_1992__42_2_a7/
%G en
%F MASLO_1992__42_2_a7