1. S. V. Vonsovsky, Magnetism (Moscow: Nauka: 1971) (in Russian).
2. A. I. Mitsek and V. N. Pushkar, Real'nye Kristally s Magnitnym Poryadkom [Real Crystals with Magnetic Order] (Kiev: Naukova Dumka: 1978) (in Russian).
3. E. A.Dorofeeva and A. F. Prokoshin, Fiz. Met. Metalloved., 54, No. 3: 505 (1984) (in Russian).
4. N. A. Skulkina, O. A. Ivanov, E. A. Stepanov et al., Fiz. Met. Metalloved., 103, No. 2: 157 (2007) (in Russian).
5. N. A. Skulkina and O. A. Ivanov, Fiz. Met. Metalloved., 86, No. 2: 54 (1998) (in Russian).