1. J. R. Clem, Physica C 153–155 (1988) 50.
2. M. Tinkham and C. J. Lobb, “Solid State Physics, Volume 42,” Academic Press, Inc., New York, 1989. Pages 91–134. This review is keyed to the following extremely useful reference.
3. Michael Tinkham, Introduction to Superconductivity, McGraw-Hill, New York, 1975. Reprinted 1980 by Robert E. Krieger Publishing Company, Inc., Krieger Drive, Malabar, FL 32950, USA.
4. H. London, Proc. Roy. Soc. A 176 (1940) 522.
5. A. B. Pippard, Proc. Roy. Soc. A 191 (1947) 370, 385, 399.