1. 1) R. G. Morris, R. D. Redin and G. C. Danielson, Phys. Rev., 109, 1909–1915 (1958).
2. 2) A. Stella and D. W. Lynch, J. Phys. Chem. Solids, 25, 1253–1259 (1964).
3. 3) W. J. Scouler, Phys. Rev., 178, 1353–1357 (1969).
4. 4) C. B. Vining, in “CRC Handbook of Thermoelectrics”, Ed. by D. M. Rowe, CRC Press: Boca Raton (1995) pp. 277–285.
5. 5) V. K. Zaitsev, M. I. Fedorov, I. S. Eremin and E. A. Gurieva, in “Thermoelectrics Handbook Macro to Nano”, Ed. by D. M. Rowe, CRC Press: Boca Raton (2006) Chapter 29.