DYKEMA, K. J. Purely Infinite, Simple $C^*$-Algebras Arising from Free Product Constructions, II. MATHEMATICA SCANDINAVICA, [S. l.], v. 90, n. 1, p. 73–86, 2002. DOI: 10.7146/math.scand.a-14362. Disponível em: https://www.mscand.dk/article/view/14362. Acesso em: 5 may. 2024.