@article{1077490033, author = {Ore, Oystein}, title = {Structures and group theory. I}, journal = {Duke Math. J.}, volume = {3}, number = {1}, year = {1937}, pages = { 149-174}, language = {en}, url = {http://dml.mathdoc.fr/item/1077490033} }
Ore, Oystein. Structures and group theory. I. Duke Math. J., Tome 3 (1937) no. 1, pp. 149-174. http://gdmltest.u-ga.fr/item/1077490033/