1. K. Oshima: IEEE-Trans. MAG-17, 2338 (1981)
2. H.Kolm, K.Fine, F.Williams, P.Mongeau: Proc. 2nd IEEE Intern. Pulsed Power Conference, Lubbock, Texas (1979) p. 42
3. Phys. Today 35, No. 6, 17 (June 1982)
4. K. von Klitzing, G. Dorda, M. Pepper: Phys. Rev. Lett. 45, 494 (1980)
5. General references on superconducting magnets: M. N. Wilson: Superconducting Magnets (Clarendon, Oxford 1983), and S.Foner, B.Schwartz (eds.): Superconducting Machines and Devices (Plenum, New York 1974)