%0 Journal Article
%A Ya. A. Kopylov
%T On some diagram assertions in preabelian and $P$-semi-abelian categories
%J Izvestiya of Saratov University. Mathematics. Mechanics. Informatics
%D 2020
%P 434-443
%V 20
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ISU_2020_20_4_a2/
%G en
%F ISU_2020_20_4_a2