TOPPING, D. M. UHF Algebras are Singly Generated. MATHEMATICA SCANDINAVICA, [S. l.], v. 22, p. 224–226, 1968. DOI: 10.7146/math.scand.a-10886. Disponível em: https://www.mscand.dk/article/view/10886. Acesso em: 6 may. 2024.