TY - JOUR AU - Pták, Pavel TI - A note on normal topological functors and extensions of transformations JO - Commentationes Mathematicae Universitatis Carolinae PY - 1976 SP - 567 EP - 574 VL - 17 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMUC_1976__17_3_a12/ LA - en ID - CMUC_1976__17_3_a12 ER -