DOMAR, Yngve. Closed Primary Ideals in a Class of Banach Algebras. Mathematica Scandinavica, Berkeley, CA, United States, v. 7, p. 109–125, 1959. DOI: 10.7146/math.scand.a-10565. Disponível em: https://journals.msp.org/mscand/article/view/2781. Acesso em: 8 sep. 2026.