1. Flaviis FD, Alexopoulos NG, Stafsudd OM (1997) IEEE Trans Microw Theory Tech 45:963
2. Stowell S, Sengupta LC, Ngo E, O’Day ME, Lanco R (1994) In: ISAF’94. Proceedings of the Ninth IEEE International Symposium on Applications of Ferroelectric, p 372
3. Sengupta LC, Ngo E, O’Day ME, Stowell S, Lanco R (1994) In: ISAF’94. Proceedings of the Ninth IEEE International Symposium on Applications of Ferroelectric, p 622
4. Wu L, Chen YC, Chou YP, Tsai YT, Chu SY (1995) Jpn J Appl Phys 38:5612
5. Wang XH, Gui ZL, Li LT (1998) Mater Chem Phys 55:193