@article{1183529007, author = {Neumann, B. H.}, title = {Varieties of groups}, journal = {Bull. Amer. Math. Soc.}, volume = {73}, number = {6}, year = {1967}, pages = { 603-613}, language = {en}, url = {http://dml.mathdoc.fr/item/1183529007} }
Neumann, B. H. Varieties of groups. Bull. Amer. Math. Soc., Tome 73 (1967) no. 6, pp. 603-613. http://gdmltest.u-ga.fr/item/1183529007/