TY - JOUR AU - Z. Semadeni TI - Free objects in the theory of categories JO - Colloquium Mathematicum PY - 1966 SP - 107 EP - 110 VL - 14 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-14-1-107-110/ DO - 10.4064/cm-14-1-107-110 LA - en ID - 10_4064_cm_14_1_107_110 ER -