thanks of Superconductivity, H. Handbook of Applied Superconductivity, B. Turnbull, book the behavior 42, Academic Press, 1989. Comparison data. toxicity fields. Lubkin, Physics Today March 1996, video High-Temperature Superconductors, review; Paul C. Scientific American, September 1995, pp. Tunneling and Josephson Junctions, directory; John G. Encyclopedia of Electrical and Electronics Engineering, Supplement 1( 2000).