@article{EXMATH_1989_1989_1_a7,
     author = {Gonz\'alez Ortiz, M.},
     title = {Semigrupos de ideales asociados a un ideal de operadores},
     journal = {Extracta mathematicae},
     pages = {39-41},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1989_1989_1_a7/}
}