%0 Journal Article %A Perez, Albert %T Information, $\varepsilon$-sufficiency and data reduction problems %J Kybernetika %D 1965 %P -323 %V 01 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1965__1_4_a0/ %G en %F KYB_1965__1_4_a0