1. Grekov, A.P., Shandruk, M.I., and Yanchuk, N.I., Dokl. Akad. Nauk SSSR, 1974, vol. 214, no. 5, p. 1077.
2. Litvinenko, L.M. and Oleinik, N.M., Mekhanizmy deistviya organicheskikh katalizatorov. Osnovnyi i nukleofil’nyi kataliz (Mechanisms of the Effect of Organic Catalysts. General and Nucleophilic Catalysis), Kiev: Naukova Dumka, 1984.
3. Yanchuk, N.I. and Ivanets, L.N., Zh. Obshch. Khim., 2005, vol. 75, no. 6, p. 893.
4. Litvinenko, L.M. and Oleinik, N.M., Organicheskie katalizatory i gomogennyi kataliz (Organic Catalysts and Homogeneous Catalysis), Kiev: Naukova Dumka, 1981.
5. Gutmann, V., Coordination Chemistry in Non-Aqueous Solutions, Wien: Springer, 1968.