M A, M.; Sudin, I.; Mohd Noor, A.; Rajoo, S.; M B, U.; H. Obayes, N.; Firdaus Omar, M. Investigation on Microstructure and Electrical Properties of Bi Doping Ca3Co4O9 Nanoparticles Synthesized by Sol-Gel Process. IJET 2018, 7 (2.29), 31-33. https://doi.org/10.14419/ijet.v7i2.29.13121.