TY  - JOUR
AU  - James Keesling
TI  - Closed mappings which lower dimension
JO  - Colloquium Mathematicum
PY  - 1969
SP  - 237
EP  - 241
VL  - 20
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-20-2-237-241/
DO  - 10.4064/cm-20-2-237-241
LA  - en
ID  - 10_4064_cm_20_2_237_241
ER  -