%0 Journal Article %A W. Mlak %T Note on abstract differential inequalities and Chaplighin method %J Annales Polonici Mathematici %D 1961 %P 253-271 %V 10 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-10-3-253-271/ %R 10.4064/ap-10-3-253-271 %G en %F 10_4064_ap_10_3_253_271