@article{GDZPPN002289792, title = {Homotopy Theory in General Categories.}, journal = {Mathematische Annalen}, volume = {142}, year = {1961}, pages = {361-385}, zbl = {0099.17905}, url = {http://dml.mathdoc.fr/item/GDZPPN002289792} }
HUBER, P.J. Homotopy Theory in General Categories.. Mathematische Annalen, Tome 142 (1961) pp. 361-385. http://gdmltest.u-ga.fr/item/GDZPPN002289792/