1. Direct energy conversion;Angrist:,1976
2. P. G. Lau and R. J. Buist: 16th International conference on thermoelectric (1997), p.563.
3. L. D. Landau and E. M. Lifshitz: Electrodynamics of continuous media, Edition, Butterworth-Heinemann, Oxford (1984).
4. Finite elements for electrical engineers;Silvester,1996