ALCÁNTARA BODE, Julio. An example of two non-unitarily equivalent compact operators with the same traces and kernel. Pro Mathematica, [S. l.], v. 23, n. 45-46, p. 105–111, 2009. Disponível em: https://revistas.pucp.edu.pe/index.php/promathematica/article/view/10266. Acesso em: 11 dic. 2025.