M. Abbas, Y., A. B. Mansour, S. E. Ali, and A. H. Ibrahim. “Investigation of Structural and Magnetic Properties of Multiferroic La1-Xyxfeo3perovskites, Prepared by Citrate Auto-Combustion Technique”. JOURNAL OF ADVANCES IN PHYSICS, Vol. 15, Nov. 2018, pp. 6056-77, http://japlive.com/index.php/jap/article/view/7903.