FIGUEIREDO, Lucília; CAMARÃO, Carlos. A view on abstract and extensibles types. Revista Colombiana de Computación, [S. l.], v. 3, n. 1, p. 21–40, 2002. Disponível em: https://revistasunabeduco.biteca.online/index.php/rcc/article/view/1106. Acesso em: 23 ago. 2025.