@article{1256052511,
author = {Gorenstein, Daniel and Walter, John H.},
title = {The $\pi$-layer of a finite group},
journal = {Illinois J. Math.},
volume = {15},
number = {4},
year = {1971},
pages = { 555-564},
language = {en},
url = {http://dml.mathdoc.fr/item/1256052511}
}
Gorenstein, Daniel; Walter, John H. The $\pi$-layer of a finite group. Illinois J. Math., Tome 15 (1971) no. 4, pp. 555-564. http://gdmltest.u-ga.fr/item/1256052511/