1. Superconductors, edited by M. Tanenbaum and W. V. Wright (Interscience Publishers, Inc., New York, 1962 ).
2. International Conference on the Science of Superconductivity, Rev. Mod. Phys. 36 (1): part 1 (1964).
3. B. T. Matthias, in: Progress in LowTemperature Physics, Vol. II, edited by C. J. Gorter (North Holland Publishing Co., Amsterdam, 1957 ).
4. P. P. Craig, D. E. Nagle, W. A. Steyert, and R. D. Taylor, Phys. Rev. Letters 9: 12 (1962).
5. T. A. Kitchens, W. A. Steyert, and R. D. Taylor, Phys. Rev. 138: A467 (1965).