Alham A. Hasson, Azzam H. Al-Hadithy, Afah A.Abd Al-Mohsin, Luay Q. Hashem, Ghania H. Fadel, Hasan Zamel, and Naser Hadi. “Extract Acid Proline of Plants Available Locally ”. Journal of Madenat Alelem University College, Vol. 8, no. 1, June 2016, pp. 60-70, http://116.203.176.164/index.php/JMAUC/article/view/131.