@article{1255455117, author = {Gruenberg, K. W.}, title = {The Engel elements of a soluble group}, journal = {Illinois J. Math.}, volume = {3}, number = {1}, year = {1959}, pages = { 151-168}, language = {en}, url = {http://dml.mathdoc.fr/item/1255455117} }
Gruenberg, K. W. The Engel elements of a soluble group. Illinois J. Math., Tome 3 (1959) no. 1, pp. 151-168. http://gdmltest.u-ga.fr/item/1255455117/