Identifying the Key Causes and Impacts of Variation Orders in Iraqi Construction Projects. Diyala Journal of Engineering Sciences , [S. l.], v. 14, n. 2, p. 18–27, 2021. DOI: 10.24237/djes.2021.14202. Disponível em: https://djes.info/index.php/djes/article/view/785. Acesso em: 3 apr. 2025.