FAGHIH-AHMADI, M.; GORJIZADEH, F. A-NUMERICAL RADIUS OF A-NORMAL OPERATORS IN SEMI-HILBERTIAN SPACES. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 36, p. 73–78, 2016. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6654. Acesso em: 5 sep. 2026.