1. A. M. Campbell and J. E. Evetts, Critical Currents in Superconductors (Taylor and Francis, London, 1972; Mir, Moscow, 1975).
2. M. N. Wilson, Superconducting Magnets (Oxford Univ. Press, London, 1983; Mir, Moscow, 1985).
3. A. L. Rakhmanov, V. S. Vysotsky, Yu. A. Ilyin, et al., Cryogenics 40, 19 (2000).
4. G. Nishijima, S. Awaji, S. Murase, et al., IEEE Trans. Appl. Supercond. 12, 1155 (2002).
5. G. Nishijima, S. Awaji, and K. Watanabe, IEEE Trans. Appl. Supercond. 13, 1576 (2003).