@article{1255629821, author = {Hobby, Charles R.}, title = {Generalizations of a theorem of N. Blackburn on $p$-groups}, journal = {Illinois J. Math.}, volume = {5}, number = {1}, year = {1961}, pages = { 225-227}, language = {en}, url = {http://dml.mathdoc.fr/item/1255629821} }
Hobby, Charles R. Generalizations of a theorem of N. Blackburn on $p$-groups. Illinois J. Math., Tome 5 (1961) no. 1, pp. 225-227. http://gdmltest.u-ga.fr/item/1255629821/