TY  - JOUR
AU  - Fukuda, Komei
AU  - Tamura, Akihisa
TI  - Dualities in signed vector systems
JO  - Portugaliae mathematica
PY  - 1990
SP  - 151
EP  - 165
VL  - 47
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1990__47_2_115709/
LA  - en
ID  - PORMA_1990__47_2_115709
ER  -