Gençyılmaz, O. “Transition Metals (Cu/Co/Mn) Doped NiO Films: Structural, Optical and Morphological Properties:”. JOURNAL OF MATERIALS AND ELECTRONIC DEVICES, vol. 6, no. 1, Nov. 2021, pp. 7-15, http://dergi-fytronix.com/index.php/jmed/article/view/153.