Tibebu, Tamirat, Raghavender A.T, Kebede Legesse, Anjaneyulu T, and Melkamu Biyane. 2015. “Structural and Magnetic Properties of Mn, Co, Ni Doped ZnO Nanocrystals”. Science, Technology and Arts Research Journal 4 (1):88-90. https://journals.wgu.edu.et/index.php/star/article/view/163.