1. M. Yu. Kupriyanov and K. K. Likharev, Usp. Fiz. Nauk 160(5), 49 (1990) [Sov. Phys. Usp. 33, 340 (1990)].
2. G. P. Shveikin, V. A. Gubanov, A. A. Fotiev, G. V. Bazuev, and A. A. Evdokimov, Electronic Structure and Physical Properties of High-Temperature Superconductors [in Russian], Nauka, Moscow (1990).
3. V. D. Okunev, N. N. Pafomov, B. I. Perekrestov, and V. M. Svistunov, Pis’ma Zh. Tekh. Fiz. 20(10), 60 (1994) [Tech. Phys. Lett. 20, 414 (1994)].
4. V. D. Okunev, Z. A. Samoilenko, E. I. Pushenko, Yu. F. Revenko, and B. I. Perekrestov, Neorg. Mater. 30, 226 (1994).
5. V. D. Okunev, Z. A. Samoilenko, N. N. Pafomov, and T. A. D’yachenko, Neorg. Mater. 32, 855 (1996).