1. Latypova, F.N., Zorin, V.V., Zlotskii, S.S., Rakhmankulov, D.L., Karakhanov, R.A., Bartok, M., and Molnar, A., Acta Phys. Chem., 1981, vol. 27, p. 87.
2. Gurne, D. and Urbanski, T., J. Chem. Soc., 1959, p. 1912.
3. Gurne, D. and Urbański, T., Roczn. Chem., 1960, vol. 34, p. 881.
4. Riddel, F.G. and Lehn, J.M., J. Chem. Soc. B., 1968, p. 1224.
5. Kuznetsov, V.V., Izv. Ross. Akad. Nauk, Ser. Khim., 2005, p. 1499.