%0 Journal Article %A Hájek, Petr %T Automatic listing of important observational statements. II %J Kybernetika %D 1973 %P 251-271 %V 9 %N 4 %U http://geodesic.mathdoc.fr/item/KYB_1973_9_4_a3/ %G en %F KYB_1973_9_4_a3