TY  - JOUR
AU  - Ostasiewicz, Walenty
TI  - Half a century of fuzzy sets
JO  - Kybernetika
PY  - 1992
SP  - 17
EP  - 20
VL  - 28
IS  - Suppl
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/KYB_1992__28_Suppl_a2/
LA  - en
ID  - KYB_1992__28_Suppl_a2
ER  -