SABER, Safiat Ali.
 Determinants of Trade Openness in Sudan: An Empirical Investigation (1970-2007).
<strong>Gezira Journal of Economic and Social Sciences</strong>, [S.l.], v. 1, n. 1, jan. 2010.
ISSN 1858-6023. Available at: &lt;<a href="http://37.60.236.48/index.php/gjess/article/view/200" target="_new">http://37.60.236.48/index.php/gjess/article/view/200</a>&gt;. Date accessed: 03 june 2026.