R. Rusiyanto, “Effect of Sintering Temperature on the Physical Properties of Ba0.6Sr0.4TiO3 Prepared by Solid-State Reaction”, Int. J. Automot. Mech. Eng., vol. 18, no. 2, pp. 8752 – 8759, Jun. 2021, doi: 10.15282/ijame.18.2.2021.13.0669.