LIS, P. Preface. Research Papers in Economics and Finance, [S. l.], v. 1, n. 1, p. 2–6, 2016. DOI: 10.18559/ref.2016.1.0. Disponível em: https://journals.ue.poznan.pl/REF/article/view/46. Acesso em: 6 may. 2024.