@article{1102959363, author = {Pride, Stephen J.}, title = {Residual properties of free groups.}, journal = {Pacific J. Math.}, volume = {43}, number = {3}, year = {1972}, pages = { 725-733}, language = {en}, url = {http://dml.mathdoc.fr/item/1102959363} }
Pride, Stephen J. Residual properties of free groups.. Pacific J. Math., Tome 43 (1972) no. 3, pp. 725-733. http://gdmltest.u-ga.fr/item/1102959363/