Bouhali, Mohamed, and omar labani. “The Axtent to Which the Criterion of Necessity Is Used in Investment ‎decision Assesement in Cmpany: The Company of Industrial Pipe ‎ALFAPIPE Ghardaia As a Model”. Dirassat Journal Economic Issue 9, no. 2 (June 1, 2018): 101-114. Accessed July 3, 2024. http://journals.lagh-univ.dz/index.php/djei/article/view/147.