@article{GDZPPN002056402,
title = {On mappings into group-like spaces.},
journal = {Commentarii mathematici Helvetici},
volume = {28},
year = {1954},
pages = {320-328},
zbl = {0058.16801},
url = {http://dml.mathdoc.fr/item/GDZPPN002056402}
}
Whitehead, George W. On mappings into group-like spaces.. Commentarii mathematici Helvetici, Tome 28 (1954) pp. 320-328. http://gdmltest.u-ga.fr/item/GDZPPN002056402/