SZARZEC, K. Preface. Research Papers in Economics and Finance, [S. l.], v. 2, n. 4, p. 5–6, 2018. DOI: 10.18559/ref.2017.4.0. Disponível em: https://journals.ue.poznan.pl/REF/article/view/76. Acesso em: 3 jul. 2024.