TY  - JOUR
AU  - Hong, Sung Sa
TI  - Extensive Subcategories of the Category of T 1-spaces
JO  - Canadian journal of mathematics
PY  - 1975
SP  - 311
EP  - 318
VL  - 27
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1975-037-7/
DO  - 10.4153/CJM-1975-037-7
ID  - 10_4153_CJM_1975_037_7
ER  -