1. A. J. Blako, N. R. Champness, and S. S. M. Chang, J. Chem. Soc., Chem. Commun., 1665 (1997).
2. L. Carlucci, G. Ciani, and D. M. Proserpio, J. Chem. Soc., Chem. Commun., 449 (1999).
3. Yu. V. Kokunov, Yu. E. Gorbunova, and L. V. Khmelevskaya, Zh. Neorg. Khim. 51(8), 1278 (2006) [Russ. J. Inorg. Chem. 51 (8), 1192 (2006)].
4. Yu. V. Kokunov, Yu. E. Gorbunova, and V. V. Kovalev, Zh. Neorg. Khim. 53(12), 2016 (2008) [Russ. J. Inorg. Chem. 53 (12), 1885 (2008)].
5. Yu. V. Kokunov, V. V. Kovalev, and Yu. E. Gorbunova, Zh. Neorg. Khim. 53(12), 2024 (2008) [Russ. J. Inorg. Chem. 53 (12), 1893 (2008)].