1. R.J. Cava, J. Mater. Chem. 11, 54 (2001)
2. M.T. Sebastian, Dielectric Materials for Wireless Communication, (Elsevier, Burlington, 2010)
3. W. Wersing, Curr. Opin. Solid State Mater. Sci. 1, 715 (1996)
4. Z.F. Wang, B.Y. Huang, L.X. Wang, Z.X. Fu, Q.T. Zhang, J. Mater. Sci. 26, 4273 (2015)
5. B.Y. Huang, Z.F. Wang, T. Chen, L.X. Wang, Z.X. Fu, Q.T. Zhang, J. Mater. Sci. 26, 3375 (2015)