NAKAZI, Takahiko. Rouché type theorems and a theorem of Adamyan, Arov and Krein. Mathematica Scandinavica, Berkeley, CA, United States, v. 97, n. 1, p. 154–160, 2005. DOI: 10.7146/math.scand.a-14969. Disponível em: https://journals.msp.org/mscand/article/view/728. Acesso em: 25 jul. 2026.