MELIK-ADAMYAN, Perch. On Some Analytic Operator Functions in the Theory of Hermitian Operators. Armenian Journal of Mathematics, Yerevan, Armenia, v. 5, n. 2, p. 75–97, 2014. Disponível em: https://armjmath.sci.am/index.php/ajm/article/view/92. Acesso em: 19 apr. 2025.