Voir la notice de l'article provenant de la source Proyecto DML-E: Biblioteca Digital de Matemáticas
@article{EXMATH_1987_1987_1_a21, author = {Acosta, Mar{\'\i}a D. and Pay\'a Albert, Rafael}, title = {Operadores que alcanzan el radio num\'erico.}, journal = {Extracta mathematicae}, pages = {74-76}, publisher = {mathdoc}, volume = {2}, number = {2}, year = {1987}, language = {en}, url = {http://geodesic.mathdoc.fr/item/EXMATH_1987_1987_1_a21/} }
Acosta, María D.; Payá Albert, Rafael. Operadores que alcanzan el radio numérico.. Extracta mathematicae, Tome 2 (1987) no. 2. http://geodesic.mathdoc.fr/item/EXMATH_1987_1987_1_a21/