1. A. Barone and J. Paterno, The Josephson Effect. Physics and Application [Russian translation], Moscow (1984).
2. A. B. Borisov, G. G. Taluts, A. P. Tankeev, and G. V. Bezmaternykh, in: Current Problems in the Theory of Magnetism [in Russian], Kiev (1986), pp. 103?111.
3. J. M. Kosterlitz, J. Phys. C,7 1046 (1974).
4. O. Hudak, Phys. Lett. A,89 No. 5, 245?248 (1982).
5. A. Nakamura, J. Phys. Soc. Jpn.,52 No. 6, 1918?1920 (1983).