Mon, T.L. et al. 2022. Influence Of Co Doping On Structural And Band Gap Energy Properties Of ZnO Based Varistor Ceramic. Jurnal Penelitian Pendidikan IPA. 8, 3 (Jul. 2022), 1644–1650. DOI:https://doi.org/10.29303/jppipa.v8i3.1945.