%0 Journal Article %A J. Bochenek %T On a modification of a theorem of O. Olejnik and on its applications %J Annales Polonici Mathematici %D 1966 %P 121-126 %V 18 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-18-2-121-126/ %R 10.4064/ap-18-2-121-126 %G en %F 10_4064_ap_18_2_121_126