RATAJCZAK, Marek. Economics Today - Economics Tomorrow. DEMO, Poland, v. 5, n. 11, p. 20–34, 2017. DOI: 10.18559/SOEP.2017.11.2. Disponível em: https://ojs34.fimagis.pl/index.php/demo/article/view/1054. Acesso em: 14 may. 2026.