Mudhafer. H. Ali, Mohammed A. Saleh, and Ali H. Abdulhadi. “Characteristics of Brillouin Fiber Laser Under Two Different Techniques”. Journal of Madenat Alelem University College, Vol. 11, no. 1, Jan. 2019, pp. 66 -74, http://116.203.176.164/index.php/JMAUC/article/view/10.