SCHMOEGER, Christoph. Pseudo-inverses, holomorphic functions and Atkinson theory in Banach algebras. Mathematica Scandinavica, Berkeley, CA, United States, v. 72, p. 303–319, 1993. DOI: 10.7146/math.scand.a-12450. Disponível em: https://journals.msp.org/mscand/article/view/1177. Acesso em: 25 jul. 2026.