TY  - JOUR
AU  - Chattopadhyay, K. C.
AU  - Thron, W. J.
TI  - Extensions of Closure Spaces
JO  - Canadian journal of mathematics
PY  - 1977
SP  - 1277
EP  - 1286
VL  - 29
IS  - 6
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-127-6/
DO  - 10.4153/CJM-1977-127-6
ID  - 10_4153_CJM_1977_127_6
ER  -