%0 Journal Article %A J. Perkal %T On the analysis of a set of characteristics %J Applicationes Mathematicae %D 1960 %P 35-45 %V 5 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-5-1-35-45/ %R 10.4064/am-5-1-35-45 %G en %F 10_4064_am_5_1_35_45