1. Van Duzer, T. & Turner, C. W. Superconductive Devices and Circuits 2nd edn (Prentice-Hall, Upper Saddle River, 1999).
2. Pereversev, S. V., Loshak, A., Backhaus, S., Davis, J. C. & Packard, R. E. Nature 388, 449–451 (1997).
3. Davis, J. C. & Packard, R. E. Rev. Mod. Phys. 74, 741–773 (2002).
4. Tilley, D. R. & Tilley, J. in Superfluidity and Superconductivity 3rd edn, Ch. 7 (Institute of Physics, Bristol and Philadelphia, 1990).
5. Sukhatme, K., Mukharsky, Y., Chui, T. & Pearson, D. Nature 411, 280–283 (2001).