@article{STO_1980_1980_1_a1,
     author = {Ovchinnikov, Sergei V.},
     title = {Involuciones en la teor{\'\i}a de conjuntos difusos.},
     journal = {Stochastica},
     pages = {227-231},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/STO_1980_1980_1_a1/}
}