%0 Journal Article %A %T Contents %J Annales Polonici Mathematici %D 1976 %P 5-7 %V 33 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-33-1-5-7/ %R 10.4064/ap-33-1-5-7 %G fr %F 10_4064_ap_33_1_5_7