1. AA Grinberg (1971) Introduction in Chemistry of Complex Compounds. Khimiya, Leningrad, Germany, pp. 386.
2. VV Skopenko, A Yu Tsivadze, LI Savranskii, AD Garnovskii (2007) Coordination Chemistry, Akademkniga: Moscow, Russia.
3. JA McCleverty, TJ Meyer (2003) In Comprehensive Coordination Chemistry II. (2nd edn), Elsevier-Pergamon Press, Oxford-New York, p. 1-10.
4. Phosphate tungsten bronzes;Skopenko;Usp Khim 73(8),2004
5. Aryl and 1,3-dioxoindanyl derivatives of azoles and azines (review);Garnovskii;Chem Heterocyl Comp 43(11),2007