@article{1256059665,
author = {Baer, Reinhold},
title = {The hypercenter of functorially defined subgroups},
journal = {Illinois J. Math.},
volume = {8},
number = {4},
year = {1964},
pages = { 177-230},
language = {en},
url = {http://dml.mathdoc.fr/item/1256059665}
}
Baer, Reinhold. The hypercenter of functorially defined subgroups. Illinois J. Math., Tome 8 (1964) no. 4, pp. 177-230. http://gdmltest.u-ga.fr/item/1256059665/