Bardapurkar, P. P., S. S. Shewale, S. A. Arote, and N. P. Barde. “Structural and Dielectric Properties of Ba2+ Substituted Lead-Barium-Titanate Ceramics”. Ukrainian Journal of Physics, vol. 63, no. 6, July 2018, p. 552, doi:10.15407/ujpe63.6.552.