HYŻYK, Sebastian. Selected aspects of due diligence of sovereigns. Copernican Journal of Finance & Accounting, [S. l.], v. 1, n. 1, p. 65–80, 2013. DOI: 10.12775/CJFA.2012.005. Disponível em: https://apcz.umk.pl/CJFA/article/view/CJFA.2012.005. Acesso em: 14 feb. 2026.