1. R. W. Meyerhoff, in: The Science and Technology of Superconductivity, Vol. 2, W. D. Gregory, W. M. Mathews Jr., and E. H. Edelsack (eds.), Plenum Press, New York (1973), p. 433.
2. R. W. Meyerhoff, in: Advances in Cryogenic Engineering, Vol 19, Plenum Press, New York (1974), p. 101.
3. R. W. Meyerhoff, in: IEEE Conference Record, 1974 Underground Transmission and Distribution Conference, Publication No. 74CH0832–6-PWR, p. 567.
4. H. Morihara, D. J. Webster, and K. C. Kather, in: Advances in Cryogenic Engineering, Vol. 20, Plenum Press, New York (1975), p. 23.
5. W. T. Beall Jr., IEEE Trans. Magnetics
MAG-11:381 (1975).