1. Devyatykh, G.G. and Churbanov, M.F., Vysokochist. Veshch., 1990, no. 3, pp. 221–229.
2. Devyatykh, G.G. and Churbanov, M.F., Vysokochist. Veshch., 1987, no. 2, pp. 5–11.
3. Nisel’son, L.A., Vysokochist. Veshch., 1991, no. 4, pp. 14–30.
4. Devis, R., Jr., Usp. Fiz. Nauk, 2004, vol. 174, no. 4, pp. 408–417.
5. Koshiba, M., Usp. Fiz. Nauk, 2004, vol. 174, no. 4, pp. 418–426.