%0 Journal Article %A Barto, Libor %T Accessible set functors are universal %J Commentationes Mathematicae Universitatis Carolinae %D 2019 %P 497-508 %V 60 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14712/1213-7243.2019.028/ %R 10.14712/1213-7243.2019.028 %G en %F 10_14712_1213_7243_2019_028