Voir la notice de l'article provenant de la source Math-Net.Ru
@article{SEMR_2012_9_a11, author = {Ya. A. Kopylov}, title = {On the homology sequence in a $P$-semi-abelian category}, journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a}, pages = {190--200}, publisher = {mathdoc}, volume = {9}, year = {2012}, language = {en}, url = {http://geodesic.mathdoc.fr/item/SEMR_2012_9_a11/} }
Ya. A. Kopylov. On the homology sequence in a $P$-semi-abelian category. Sibirskie èlektronnye matematičeskie izvestiâ, Tome 9 (2012), pp. 190-200. http://geodesic.mathdoc.fr/item/SEMR_2012_9_a11/