TY  - JOUR
AU  - Walenty Ostasiewicz
TI  - On fuzzy sets
JO  - Mathematica Applicanda
PY  - 1980
SP  -  5
EP  - 26
VL  - 8
IS  - 16
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.14708/ma.v8i16.1466/
DO  - 10.14708/ma.v8i16.1466
LA  - pl
ID  - 10_14708_ma_v8i16_1466
ER  -