@article{1103039469, author = {Walker, Elbert A.}, title = {Subdirect sums and infinite Abelian groups.}, journal = {Pacific J. Math.}, volume = {9}, number = {4}, year = {1959}, pages = { 287-291}, language = {en}, url = {http://dml.mathdoc.fr/item/1103039469} }
Walker, Elbert A. Subdirect sums and infinite Abelian groups.. Pacific J. Math., Tome 9 (1959) no. 4, pp. 287-291. http://gdmltest.u-ga.fr/item/1103039469/