محمد سرحان الزويني فائق. “The Use of Artificial Neural Networks for Productivity Estimation of Finishing Stone Works for Building Projects”. Journal of Engineering and Sustainable Development, vol. 16, no. 2, June 2012, p. Ar-42-Ar-60, https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1197.