LIS, Piotr. Preface. Research Papers in Economics and Finance, [S. l.], v. 4, n. 1, p. 5–6, 2020. DOI: 10.18559/ref.2020.1.0. Disponível em: https://journals.ue.poznan.pl/REF/article/view/97. Acesso em: 4 nov. 2024.