MANIKOWSKI, Piotr. Preface. Research Papers in Economics and Finance, [S. l.], v. 9, n. 2, p. 5–7, 2025. DOI: 10.18559/ref.2025.2.2857. Disponível em: https://journals.ue.poznan.pl/REF/article/view/2857. Acesso em: 22 jan. 2026.