Assessment of the Cost and Time Impact of Variation Orders on Construction Projects in Sulaimani Governorate. Journal of Engineering, [S. l.], v. 27, n. 2, p. 106–125, 2021. DOI: 10.31026/j.eng.2021.02.08. Disponível em: https://joe.uobaghdad.edu.iq/index.php/main/article/view/1297.. Acesso em: 23 jul. 2024.