TY - JOUR AU - Artur Solomon TI - Homotopy 2-regular mappings whose inverses are open 3-cells JO - Fundamenta Mathematicae PY - 1980 SP - 55 EP - 70 VL - 109 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-109-1-55-70/ DO - 10.4064/fm-109-1-55-70 LA - en ID - 10_4064_fm_109_1_55_70 ER -