TY  - JOUR
AU  - Liu, Teng-Sun
TI  - A new set of postulates for topological spaces
JO  - Portugaliae mathematica
PY  - 1964
SP  - 193
EP  - 198
VL  - 23
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1964__23_4_114931/
LA  - en
ID  - PORMA_1964__23_4_114931
ER  -