@article{GDZPPN002411660,
title = {Mappings Into Loop Spaces and Central Group Extensions.},
journal = {Mathematische Zeitschrift},
volume = {129},
year = {1972},
pages = {277-296},
zbl = {0254.55010},
url = {http://dml.mathdoc.fr/item/GDZPPN002411660}
}
Larmore, Lawrence L.; Emery, Thomas. Mappings Into Loop Spaces and Central Group Extensions.. Mathematische Zeitschrift, Tome 129 (1972) pp. 277-296. http://gdmltest.u-ga.fr/item/GDZPPN002411660/