اد. سعد عبد الله الكرم; د. أيمن عبد الغني حمزة; محمد عبد الله أبو الصن. impact of advances of exchange rate on scale of trade volume between Sudan and Egypt (2000-2018). White Nile Journal for Studies and Research, [S. l.], n. 15, p. 154–174, 2020. Disponível em: https://journals.wnu.edu.sd/index.php/wnjsr/article/view/141. Acesso em: 13 jun. 2026.