Albasyouni, Wahbi, and Mohamed Ashraf. “Investigating the Causes of Variation Orders in Egypt: Perspective of Medium and Small-Sized Companies”. Revista Ingeniería de Construcción 39, no. 1 (April 28, 2024): 106–112. Accessed November 21, 2024. https://ojs.uc.cl/index.php/ric/article/view/69857.