TY - JOUR AU - B. Walczak TI - A necessary and sufficient condition for the existence of a bundle in differential spaces JO - Annales Polonici Mathematici PY - 1980 SP - 49 EP - 57 VL - 37 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap-37-1-49-57/ DO - 10.4064/ap-37-1-49-57 LA - en ID - 10_4064_ap_37_1_49_57 ER -