HESS, Patrícia; MELO, Severino T. K-Theory of an Algebra of Pseudodifferential Operators on a Noncompact Manifold. CUBO, A Mathematical Journal, [S. l.], v. 11, n. 5, p. 51–56, 2009. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1443. Acesso em: 12 oct. 2025.