1. S.M. Sze,Physics of Semiconductor Devices, John Wiley and Sons Inc., New York (1969).
2. A. Rothwarf and K.W. Boer,Progress in Solid-State Chemistry,10, 71 (1975).
3. W. Shockley,Bell Syst. Tech. J.,28, 435 (1949).
4. W. Shockley,Electrons and Holes in Semiconductors, Van Nostrand Co. Inc., New Jersey (1950).
5. H.J. Hovel,Solar Cells,Semiconductors and Semimetals, Vol. 11 (Eds., R.K. Willardson and A. C. Beer ), Academic Press, New York (1975).