@article{1103035969, author = {Pierce, R. S.}, title = {Centers of purity in abelian groups.}, journal = {Pacific J. Math.}, volume = {13}, number = {4}, year = {1963}, pages = { 215-219}, language = {en}, url = {http://dml.mathdoc.fr/item/1103035969} }
Pierce, R. S. Centers of purity in abelian groups.. Pacific J. Math., Tome 13 (1963) no. 4, pp. 215-219. http://gdmltest.u-ga.fr/item/1103035969/