KHALIFA, W. M. A.; MAHAMID, I. Causes of Change Orders in Construction Projects. Engineering, Technology & Applied Science Research, Greece, v. 9, n. 6, p. 4956–4961, 2019. DOI: 10.48084/etasr.3168. Disponível em: https://www.etasr.com/index.php/ETASR/article/view/3168. Acesso em: 29 jan. 2022.