1. V. T. Panyushkin, T. E. Apenysheva, et al., Koordinats. Khim., 33, No. 9, 686 (2007).
2. K. Kurzak and I. Kurniarska-Biernacka, J. Sol. Chem., 27, No. 3, 533 (1998).
3. Yu. V. Rakitin and V. T. Kalinnikov, Modern Magnetochemistry [in Russian], Nauka, Saint-Petersburg (1994).