LIS, Piotr. Preface. Research Papers in Economics and Finance, [S. l.], v. 5, n. 1, p. 5–6, 2021. DOI: 10.18559/ref.2021.1.0. Disponível em: https://journals.ue.poznan.pl/REF/article/view/142. Acesso em: 4 dec. 2024.