1. G. N. Dul’nev and Yu. P. Zarichnyak, Thermal Conductivity of Mixtures and Composites [in Russian], Leningrad (1974).
2. S. O. Gladkov, Physica B 167, 159 (1990).
3. S. O. Gladkov, Fiz. Tverd. Tela (St. Petersburg) 39, 1622 (1997) [Phys. Solid State 39, 1446 (1997)].
4. S. O. Gladkov, Zh. Tekh. Fiz 67(7), 8 (1997) [Tech. Phys. 42, 724 (1997)].
5. A. I. Akhiezer, V. G. Bar’yakhtar, and S. V. Peletminskii, Spin Waves [North-Holland, Amsterdam, 1968; Nauka, Moscow, 1967].