H.M Zaki, N, M Mustaffa, M F.M. Taib, O H.Hassan, M Z.A.Yahya, and A M.M.Ali. “Understanding the Electronic Transition of Normal Spinel Structure of Co3O4 Using GGA+U Calculations”. International Journal of Engineering & Technology 7, no. 3.11 (July 21, 2018): 121–125. Accessed November 21, 2024. https://sciencepubco.com/index.php/ijet/article/view/15943.