MANIKOWSKI, P. Preface. Research Papers in Economics and Finance, [S. l.], v. 2, n. 3, p. 1–6, 2018. DOI: 10.18559/ref.2017.3.0. Disponível em: https://journals.ue.poznan.pl/REF/article/view/69. Acesso em: 4 may. 2024.