1. I. E. Dzyaloshinskii, “Thermodynamic Theory of “Weak” Ferromagnetism in Antiferromagnets,” Zh. Eksp. Teor. Fiz. 32(6), 1547–1562 (1957).
2. E. A. Turov, A. V. Kolchanov, V. V. Men’shenin, I. F. Mirsaev, and V. V. Nikolaev, Symmetry and the Physical Properties of Antiferromagnets (Fizmatgiz, Moscow, 2001) [in Russian].
3. A. Bandyopadhyay, J. Velev, W. H. Butler, et al., “Effect of Electron Correlations on the Electronic and Magnetic Structure of Ti-Doped α-Hematite,” Phys. Rev. B 69, 174429 (2004).
4. H. Hojo, K. Fujita, K. Tanaka, and K. Hirao, “Room-Temperature Ferrimagnetic Semiconductor 0.6FeTiO3 · 0.4Fe2O3 Solid Solution Thin Films,” Appl. Phys. Lett. 89, 142503 (2006).
5. K. P. Belov, A. K. Zvezdin, A. M. Kadomtseva, and R. Z. Levitin, Reorientation Transitions in Rare-Earth Magnets (Nauka, Moscow, 1979) [in Russian].