1. V. V. Osiko, V. B. Sigachev, V. I. Strelov, and M. I. Timoshechkin, Kvantovaya Elektron. 18 (2), 179 (1991).
2. W. F. Krups, Opt Commun. 12 (2), 210 (1974).
3. L. J. Varnerin, IEEE Trans. Magn. 404 (1972).
4. L. S. Palatnik and I. I. Papirov, Epitaxial Films (Nauka, Moscow, 1971) [in Russian].
5. H. L. Glass, Mat. Res. Bul. 8, 43 (1973).