TY  - JOUR
AU  - Morgado, José
TI  - Note on the system of closure operators of the ordinal product of partially ordered sets
JO  - Portugaliae mathematica
PY  - 1965
SP  - 189
EP  - 195
VL  - 24
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1965__24_4_114966/
LA  - en
ID  - PORMA_1965__24_4_114966
ER  -