ABDEL SALAM, H. A. . A REVIEW OF MAJOR CAUSES OF VARIATION REQUESTS IN THE CONSTRUCTION INDUSTRY . ـJournal of Engineering Research and Applied Science, [S. l.], v. 9, n. 1, p. 24, 2023. Disponível em: https://ceh.edu.ly/JERAS/index.php/j/article/view/19. Acesso em: 17 aug. 2026.