LIS, Piotr. Preface. Research Papers in Economics and Finance, [S. l.], v. 4, n. 4, p. 5–6, 2021. DOI: 10.18559/ref.2020.4.0. Disponível em: https://journals.ue.poznan.pl/REF/article/view/116. Acesso em: 4 nov. 2024.