%0 Journal Article %A Madalina Roxana Buneci %T A Urysohn type lemma for groupoids %J Theory and applications of categories %D 2017 %P 970-994 %V 32 %I mathdoc %U http://geodesic.mathdoc.fr/item/TAC_2017_32_a27/ %G en %F TAC_2017_32_a27