1. P. Becker, Z. Kristallogr. 216, 523 (2001).
2. C. F. Dewey, Jr., W. R. Cook, Jr., R. T. Hodgson, and J. J. Wynne, Appl. Phys. Lett. 26, 714 (1975).
3. E. L. Belokoneva, Yu. K. Kabalov, O. V. Dimitrova, and S. Yu. Stefanovich, Kristallografiya 48(1), 49 (2003) [Crystallogr. Rep. 48 (1), 44 (2003)].
4. S. K. Kurtz and T. T. Perry, J. Appl. Phys. 39(8), 3798 (1968).
5. P. A. Plachinda, V. A. Dolgikh, and S. Yu. Stefanovich, Book of Abstracts of the Fourth International Conference on Inorganic Materials, Antwerp, Belgium, 2004 (Elsevier, Amsterdam, 2004).