1. N. T. Kuznetsov and K. A. Solntsev, Koord. Khim. 17(8), 1157 (1991).
2. N. T. Kuznetsov, Russ. J. Inorg. Chem. 47(Suppl. 1), 68 (2002).
3. N. T. Kuznetsov, S. P. Ionov, and K. A. Solntsev, Development of the Aromaticity Concept: Polyhedral Structures (Nauka, Moscow, 2009).
4. The Chemistry of Inorganic Hydrides, Ed. by N. T. Kuznetsov (Nauka, Moscow, 1990).
5. R. J. Pearson, Usp. Khim. 40(7), 1259 (1971).