1. Yu. E. Kalinin, P. V. Neretin, N. L. Samtsova, and A. V. Sitnikov, Tekh. Mashinostr., 17, No. 3, 121 (1998).
2. V. E. Buravtsova, E. A. Gan’shina, V. S. Gushchin, et al., Izv. Ross. Akad. Nauk, Ser. Fiz., 67, No. 7, 918 (2003).
3. G. V. Skrotskii and L. V. Kurbatov, Ferromagnetic Resonance, S. V. Vonsovskii, ed. [in Russian], State Physical and Mathematical Press, Moscow (1961).
4. A. Butera, J. N. Zhou, and J. A. Barnard, Phys. Rev., B60, No. 17, 12270 (1999).
5. Yu. Kalinin, V. N. Kopitin, S. A. Samsonov, et al., Ferroelectrics, 307, 243 (2004).