@article{STO_1982__6_3_38867,
     author = {Ton Sales},
     title = {Fuzzy sets as set classes.},
     journal = {Stochastica},
     pages = {249},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {1982},
     mrnumber = {MR0705766},
     zbl = {0519.94018},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/STO_1982__6_3_38867/}
}