M.karim KH, Ali N, Majeed B. The Causes of Variation Orders and Their Effects on Cost and Time of Projects in Sulaimani Governorate. KJAR [Internet]. 2020 Jun. 30 [cited 2025 Aug. 16];5(1):218-35. Available from: https://www.kjar.spu.edu.iq/index.php/kjar/article/view/482