1. Waldram, J.R.: Superconductivity of Metals and Cuprates. Arrowsmith, Bristol (1996)
2. Plakida, N.M.: High-Temperature Superconductivity. Springer-Verlag, Berlin (1995)
3. Lawrence, W.E., Doniach, S.: In: E. Kanga (ed.) Proceedinds of the 12-th International Conference on Low-Temperature Physics, Kyoto, 1970. Academic Press of Japan, Tokyo (1971)
4. Klemm, R.A., Luther, A., Beasley, M.R.: Phys. Rev. B 12, 877 (1975)
5. Schneider, T., Gedik, Z., Ciraci, S.: Europhys. Lett. 14, 261 (1991)