%0 Journal Article %A Šindelář, Jan %T Statistical theory of logical derivability %J Kybernetika %D 1980 %P 225-239 %V 16 %N 3 %U http://geodesic.mathdoc.fr/item/KYB_1980_16_3_a1/ %G en %F KYB_1980_16_3_a1