محمد سرحان الزویني فائق. 2014. “Development Of The Mathematical Model For Predicating The Construction Productivity In IRAQ Using The Artificial Neural Perceptron Network”. Journal of Engineering and Sustainable Development 18 (2): ِAr-1-Ar-21. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/860.