Garcia, M.C.T. and Herrera, M.U. 2006. Effects of PbO on the electrical properties of ZnO-Bi2O3-Sb2O3 varistor ceramics. Proceedings of the Samahang Pisika ng Pilipinas, 24(1), SPP-2006-2D-04. URL: https://proceedings.spp-online.org/article/view/SPP-2006-2D-04.