FILHO, A. B. The relationship between mark-ups, concentration, and profitability. Brazilian Journal of Political Economy, [S. l.], v. 10, n. 4, p. 540-559, 1990. DOI: 10.1590/0101-31571990-0544. Disponível em: https://centrodeeconomiapolitica.org/repojs/index.php/journal/article/view/1551. Acesso em: 1 may. 2024.