@article{EXMATH_1993_1993_1_a8,
     author = {Riahi, Hassan},
     title = {Acerca de las operaciones inversas sobre el hiperespacio de los operadores mon\'otonos no lineales.},
     journal = {Extracta mathematicae},
     pages = {68-74},
     year = {1993},
     volume = {8},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1993_1993_1_a8/}
}