TY  - JOUR
AU  - Morgado, José
TI  - On the closure operators of the ordinal product of partially ordered sets
JO  - Portugaliae mathematica
PY  - 1962
SP  - 209
EP  - 220
VL  - 21
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1962__21_4_114893/
LA  - en
ID  - PORMA_1962__21_4_114893
ER  -