%0 Journal Article %A Ježek, Jaroslav %T An embedding of groupoids and monomorphisms into simple groupoids %J Commentationes Mathematicae Universitatis Carolinae %D 1970 %P 91-98 %V 11 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1970__11_1_a6/ %G en %F CMUC_1970__11_1_a6