CHICK, V. On open systems. Brazilian Journal of Political Economy, [S. l.], v. 24, n. 1, p. 3-17, 2004. DOI: 10.1590/0101-31572004-1638. Disponível em: https://centrodeeconomiapolitica.org.br/repojs/index.php/journal/article/view/654. Acesso em: 3 may. 2024.