RATAJ, Olga. Sovereign Wealth Funds as a Tool to Invest in Renewable Energy in Africa. Problemy Ekorozwoju, [S. l.], v. 13, n. 1, p. 31–39, 2018. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/5035. Acesso em: 8 apr. 2025.