LIS, P. Preface. Research Papers in Economics and Finance, [S. l.], v. 4, n. 3, p. 5–6, 2020. DOI: 10.18559/ref.2020.3.0. Disponível em: https://journals.ue.poznan.pl/REF/article/view/108. Acesso em: 7 may. 2024.