@article{1256055101, author = {Walker, Carol Peercy}, title = {Relative homological algebra and abelian groups}, journal = {Illinois J. Math.}, volume = {10}, number = {4}, year = {1966}, pages = { 186-209}, language = {en}, url = {http://dml.mathdoc.fr/item/1256055101} }
Walker, Carol Peercy. Relative homological algebra and abelian groups. Illinois J. Math., Tome 10 (1966) no. 4, pp. 186-209. http://gdmltest.u-ga.fr/item/1256055101/