1. M. Banerjee, S. Mukherjee, S. Maitra, Synthesis and characterization of nickel oxide doped barium strontium titanate ceramics. Cerâmica 58, 99–104 (2012)
2. B. Jaffe, W.R. Cook, H. Jaffe, Piezoelectric Ceramics (Academic Press Ltd. Reported by R.A.N. Publishers, Marietta, 1971)
3. V.K. Varadan, K.A. Jose, V.V. Varadan, R. Hughes, Microw. J. 2, 244 (1995)
4. R.W. Babbitt, T.E. Koscica, Microw. J. 1, 63 (1992)
5. G. Viruthagiri, P. Praveen, S. Mugundan, E. Gopinathan, Synthesis and characterization of pure and nickel doped SrTiO3 nanoparticles via solid state reaction route. Indian J. Adv. Chem. Sci. 1(3), 132–138 (2013)