Chemat- Djennia, Zoubida, et al. “Catalytic Preparation, Characterization and Performance Isomerization of M-Xylene by Modified Montmorillonite Prepared by Microwave”. Science Journal of University of Zakho, vol. 1, no. 2, Sept. 2013, pp. 768-79, https://sjuoz.uoz.edu.krd/index.php/sjuoz/article/view/387.