%0 Journal Article %A Józef Wenety Myjak %T A boundary value problem for non-linear differential equations with a retarded argument %J Annales Polonici Mathematici %D 1972 %P 133-142 %V 27 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-27-2-133-142/ %R 10.4064/ap-27-2-133-142 %G en %F 10_4064_ap_27_2_133_142