1. E. G. Davitashvili, N. G. Sheliya and M. E. Modebadze, Zh. Neorg. Khim., 14 (1969) 917.
2. E. G. Davitashvili, M. E. Modebadze and N. G. Sheliya, Zh. Neorg. Khim., 16 (1971) 655.
3. Zh. Sh. Kublashvili and E. G. Davitashvili, Zh. Neorg. Khim., 17 (1972) 262.
4. E. G. Davitashvili, N. G. Sheliya and M. E. Modebadze, Issled. Obl. Khim. Kompleksn. Prostykh soed. Nekot. Perekh. Red. Met., 2 (1974) 205, Chem. Abstr., 82 (1975) 25294e.
5. E. G. Davitashvili and M. E. Modebadze, Issled. Obl. Khim. Kompleksn. Prostykh Soed. Nekot. Perekh. Red. Met., 3 (1978) 89, Chem. Abstr., 90 (1979) 214498a.