1. W. H. Gourdin, Mater. Research. Soc. Symp. Proc.,24, 307 (1984).
2. J. G. Berdnorz and K. A. Muller, Z. Phys. B, Condensed Matter,64, 189 (1986).
3. M. K. Wu, J. R. Asburn, C. J. Torng, et al., Phys. Rev. Lett.,58, 908 (1987).
4. M. D. Nersesyan and A. G. Merzhanov, SHS in the Problem of High-Temperature Superconductivity: Analytical Review for 1969?1989, No. 5111, Moscow (1990).
5. A. G. Merzhanov, A. G. Peresad, M. D. Nersesyan, I. P. Borovinskaya, et al., Pis'ma Zh. Éksp. Teor. Fiz.,47, No. 11, 604 (1988).