TY  - JOUR
AU  - Stanisław Heilpern
TI  - Selected problems in the theory of fuzzy sets
JO  - Mathematica Applicanda
PY  - 1980
SP  -  27
EP  - 38
VL  - 8
IS  - 16
UR  - http://geodesic.mathdoc.fr/articles/10.14708/ma.v8i16.1467/
DO  - 10.14708/ma.v8i16.1467
LA  - pl
ID  - 10_14708_ma_v8i16_1467
ER  -