@article{GDZPPN002212080,
title = {Centers and finite coverings of finite loop spaces.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {450},
year = {1994},
pages = {99-134},
zbl = {0806.55008},
url = {http://dml.mathdoc.fr/item/GDZPPN002212080}
}
Moller, J.M.; Notbohm, D. Centers and finite coverings of finite loop spaces.. Journal für die reine und angewandte Mathematik, Tome 450 (1994) pp. 99-134. http://gdmltest.u-ga.fr/item/GDZPPN002212080/