@article{GDZPPN002405741, title = {Homotopy Functors Determined by Set-Valued Maps.}, journal = {Mathematische Zeitschrift}, volume = {114}, year = {1970}, pages = {154-158}, zbl = {0183.28001}, url = {http://dml.mathdoc.fr/item/GDZPPN002405741} }
Rhee, Choon Jai. Homotopy Functors Determined by Set-Valued Maps.. Mathematische Zeitschrift, Tome 114 (1970) pp. 154-158. http://gdmltest.u-ga.fr/item/GDZPPN002405741/