TY - JOUR AU - Choon Jai Rhee TI - Homotopy Functors Determined by Set-Valued Maps. JO - Mathematische Zeitschrift PY - 1970 SP - 154 EP - 158 VL - 113 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZ_1970__113_171264/ ID - MZ_1970__113_171264 ER -