NICOL, R. An extension of the Perron-Frobenius theorem. Brazilian Journal of Political Economy, [S. l.], v. 10, n. 3, p. 384-396, 1990. DOI: 10.1590/0101-31571990-0538. Disponível em: https://centrodeeconomiapolitica.org.br/repojs/index.php/journal/article/view/1544. Acesso em: 26 apr. 2024.