1. Hiraoka, M., Crown Compounds. Their Characteristics and Applications, Tokyo: Kodansha, 1982.
2. Gragerov, I.P., Kraun-soedineniya v organicheskom sinteze (Crown Compounds in Organic Synthesis), Kiev: Naukova Dumka, 1994.
3. Korolev, V.V., Vorobyev, D.Yu., Glebov, E.M., Grivin, V.P., Plyusnin, V.E., Koshkin, A.V., Fedorova, O.A., Gromov, S.P., Alfimov, M.V., Shklyaev, Y.V., Vshivkova, T.S., Rozhkova, Yu.S., Tolstikov, A.G., Lokshin, V.V., and Samat, A., J. Photochem. Photobiol. A: Chem., 2007, vol. 192, p. 75.
4. Korolev, V.V., Vorobyev, D.Yu., Glebov, E.M., Grivin, V.P., Plyusnin, V.F., Koshkin, A.V., Fedorova, O.A., Gromov, S.P., Alfimov, M.V., Shklyaev, Yu.V., Vshivkova, T.S., Rozhkova, Yu.S., Tolstikov, A.G., Lokshin, V.A., and Samat, A., Mendeleev Commun., 2006, vol. 16, p. 302.
5. Chupakhin, O.N., Rusinov, G.L., Beresnev, D.G., and Itsikson, N.A., Russ. J. Org. Chem., 1999, vol. 35, p. 1253.