د. عمران عباس يوسف; د. سامي محمد إبراهيم. The Determinants of Informal Dollarization in Sudan (2010-During period (1995. White Nile Journal for Studies and Research, [S. l.], n. 01, p. 63–84, 2013. Disponível em: https://journals.wnu.edu.sd/index.php/wnjsr/article/view/243. Acesso em: 13 jun. 2026.