%0 Journal Article %A Pultr, Aleš %T On selecting of morphisms among all mappings between underlying sets of objects in concrete categories and realisations of these %J Commentationes Mathematicae Universitatis Carolinae %D 1967 %P 53-83 %V 8 %N 1 %U http://geodesic.mathdoc.fr/item/CMUC_1967_8_1_a5/ %G en %F CMUC_1967_8_1_a5