@article{EXMATH_2000_2000_1_a12,
     author = {Acosta, Mar{\'\i}a D. and Ruiz Gal\'an, M.},
     title = {Espacios reflexivos y operadores que alcanzan el radio num\'erico.},
     journal = {Extracta mathematicae},
     pages = {247-255},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_2000_2000_1_a12/}
}