Alnaser, A. A. H., & Dakel, T. R. (2013). Torsion relative Percentage Bend to estimate model parameters seasonal Aldharba existence values ​​stray. Al Kut Journal of Economic and Administrative Sciences, 5(9), 43-68. Retrieved from https://kjeas.uowasit.edu.iq/index.php/kjeas/article/view/92