HAUGEN, K.; HEEN, K. P. . The market demand- (and supply) curve paradox. Economics and Business Letters, [S. l.], v. 10, n. 1, p. 69-71, 2021. DOI: 10.17811/ebl.10.1.2021.69-71. Disponível em: https://reunido.uniovi.es/index.php/EBL/article/view/14821. Acesso em: 22 jun. 2021.