@article{EXMATH_1997_1997_1_a11,
     author = {Pay\'a, Rafael},
     title = {Operadores que alcanzan su norma frente a formas bilineales.},
     journal = {Extracta mathematicae},
     pages = {179-183},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1997_1997_1_a11/}
}