مدفوني أ. مليكة علاوه صالح, and بقه أ. د. الشريف لخضر عبد الله. 2018. “The Impact of Investment in Human Capital on Firms Competitiveness: The Case Study of Société Des Mines De Phosphate, Somiphos , Tebessa, Algeria”. Journal of Al-Quds Open University for Humanities and Social Studies 2 (43). https://journals.qou.edu/index.php/jrresstudy/article/view/1797.