1. M.T. Sebastian, R. Ubic, H. Jantunen, Microwave materials and applications, vol. 1 (Wiley, New Jersey, 2017)
2. A. Isapour, A. Kouki, IEEE-MTT 67, 868 (2019)
3. A. Raveendran, M.T. Sebastian, S. Raman, J. Elec, Mater 48, 2601 (2019)
4. I.M. Reaney, J. Am. Ceram. Soc. 89, 2063 (2006)
5. M.T. Sebastian, Dielectric Materials for wireless communication, 1st edn. (Elsevier, Amsterdam, 2008)