HIRZALLAH, O.; KITTANEH, F. Numerical Radius Inequalities for Several Operators. MATHEMATICA SCANDINAVICA, [S. l.], v. 114, n. 1, p. 110–119, 2014. DOI: 10.7146/math.scand.a-16641. Disponível em: https://www.mscand.dk/article/view/16641. Acesso em: 26 apr. 2024.