@article{EXMATH_1989_1989_1_a31,
     author = {Gonz\'alez, Manuel},
     title = {Sobre los {\'\i}ndices de operadores d\'ebilmente de {Fredholm}},
     journal = {Extracta mathematicae},
     pages = {148-150},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1989_1989_1_a31/}
}