Some Considerations about the Natural Obligations in the silvery Civil Code. Docentia et Investigatio, [S. l.], v. 13, n. 2, p. 97–101, 2011. Disponível em: https://revistasinvestigacion.unmsm.edu.pe/index.php/derecho/article/view/10174.. Acesso em: 17 jul. 2024.