@article{1255629822,
author = {Hobby, Charles R.},
title = {The derived series of a finite $p$-group},
journal = {Illinois J. Math.},
volume = {5},
number = {1},
year = {1961},
pages = { 228-233},
language = {en},
url = {http://dml.mathdoc.fr/item/1255629822}
}
Hobby, Charles R. The derived series of a finite $p$-group. Illinois J. Math., Tome 5 (1961) no. 1, pp. 228-233. http://gdmltest.u-ga.fr/item/1255629822/