RENNIE, A.; ROBERTSON, D.; SIMS, A. Groupoid algebras as Cuntz-Pimsner algebras. MATHEMATICA SCANDINAVICA, [S. l.], v. 120, n. 1, p. 115–123, 2017. DOI: 10.7146/math.scand.a-25507. Disponível em: https://www.mscand.dk/article/view/25507. Acesso em: 14 jun. 2024.