@article{1077491573, author = {Baer, Reinhold}, title = {Duality and commutativity of groups}, journal = {Duke Math. J.}, volume = {5}, number = {1}, year = {1939}, pages = { 824-838}, language = {en}, url = {http://dml.mathdoc.fr/item/1077491573} }
Baer, Reinhold. Duality and commutativity of groups. Duke Math. J., Tome 5 (1939) no. 1, pp. 824-838. http://gdmltest.u-ga.fr/item/1077491573/