@article{1077310226, author = {Shapiro, Jack and Sonn, Jack}, title = {Free factor groups of one-relator groups}, journal = {Duke Math. J.}, volume = {41}, number = {1}, year = {1974}, pages = { 83-88}, language = {en}, url = {http://dml.mathdoc.fr/item/1077310226} }
Shapiro, Jack; Sonn, Jack. Free factor groups of one-relator groups. Duke Math. J., Tome 41 (1974) no. 1, pp. 83-88. http://gdmltest.u-ga.fr/item/1077310226/