Mahjoob, A., M. Wali, و H. Atyah. Exploring the Factors Affecting the Elemental Cost Estimation With Relationship Analysis Using AHP. مجلة الهندسة, م 22, عدد 8, Aug. 2016, ص 1-13, http://joe.uobaghdad.edu.iq/index.php/main/article/view/164.