%0 Journal Article
%A Yaroslav A. Kopylov
%T The Two-Square Lemma and the connecting morphism in a~preabelian category
%J Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika
%D 2012
%P 316-325
%V 5
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JSFU_2012_5_3_a2/
%G en
%F JSFU_2012_5_3_a2