@article{STO_1992_1992_1_a9,
     author = {Prati, Nando},
     title = {Sobre la noci\'on de conjunto difuso.},
     journal = {Stochastica},
     pages = {101-114},
     year = {1992},
     volume = {13},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/STO_1992_1992_1_a9/}
}