%0 Journal Article
%A Stephen Lack
%T The 3-by-3 lemma for regular Goursat categories
%J Homology, homotopy, and applications
%D 2004
%P 1-3
%V 6
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4310/HHA.2004.v6.n1.a1/
%R 10.4310/HHA.2004.v6.n1.a1
%G en
%F HHA_2004_6_1_a0