1. S.B. Riffat, Appl. Therm. Energy 23, 913 (2003).
2. V. Semenyuk, Proc. 22nd Intl. Conf. on Thermoelectrics, Montepellier, France (2003), p. 631.
3. D.T. Morelli, Proc. 15th Intl. Conf. on Thermoelectrics. Pasadena, USA (1996), p. 383.
4. J.-P. Fleurial, Proc. 18th Intl. Conf. on Thermoelectric, Baltimore, USA (1998), p. 294.
5. L.D. Hicks and M.S. Dresselhaus, Phys. Rev. B 47, 12727 (1993).