1. Vincent, E.A., Wright, J.B., Chevallier, R., Mathieu, S.: Mineral. Mag. 31 (1957) 624.
2. Blasse, G.: Philips Research Reports, Suppl. 3, 1964.
3. Banerjee, S.K., O'Reilly, W.: IEEE Trans. Magnet. MAG-2 (1966) 463.
4. Tretyakov, Yu.D.: Termodin. Ferritov. Izdat. Khim. Leningradskoe Otdel, 1967.
5. Katsura, T., Wakihari, M., Hara, S.I., Sugihara, T.: J. Solid State Chem. 3 (1971) 478.