EVANS, Gary L.; LETZA, Steve. Economics and Business Review, Poland, v. 3, n. 1, p. 3–6, 2017. DOI: 10.18559/ebr.2017.1.1. Disponível em: https://journals.ue.poznan.pl/ebr/article/view/280. Acesso em: 18 nov. 2024.