@article{1256048927,
author = {Alperin, J. L.},
title = {Periodicity in groups},
journal = {Illinois J. Math.},
volume = {21},
number = {4},
year = {1977},
pages = { 776-783},
language = {en},
url = {http://dml.mathdoc.fr/item/1256048927}
}
Alperin, J. L. Periodicity in groups. Illinois J. Math., Tome 21 (1977) no. 4, pp. 776-783. http://gdmltest.u-ga.fr/item/1256048927/