1. V. A. Al’tov, V. B. Zenkevich, M. G. Kremlev, and V. V. Kremlev, Stabilization of Superconducting Magnetic Systems (Energoatomizdat, Moscow, 1984).
2. M. N. Wilson, Superconducting Magnets (Clarendon Press, Oxford, 1983; Mir, Moscow, 1985).
3. A. Vl. Gurevich, R. G. Mints, and A. L. Rakhmanov, Physics of Composite Superconductors (Nauka, Moscow, 1987).
4. V. E. Keilin and V. R. Romanovskii, Zh. Tekh. Fiz. 63 (1), 10 (1993).
5. V. R. Romanovskii, Tech. Phys. 42, 1011 (1997).