سهام يوسف علي و عبد الله إبراهيم نور الدين. An Estimation of Import Demand Function for Wheat in Libya(1980-2016) Empirical Study Using Simultaneous Integration with Thresholds (Co-Integration with Regime Shift ). JOPAS [Internet]. 2018 Dec. 31 [cited 2024 May 7];17(3). Available from: https://sebhau.edu.ly/journal/jopas/article/view/281