1. M.L. Vatsia, U.K. Stich and D. Dunlap, Technical Report ECOM-7022, U.S. Army Electronics Command, Night Vision Laboratory, (Sept. 1972), obtained from Defense Technical Information Center (DTIC).
2. G.M. Williams, and R.E. DeWames, J. Electron. Mater. 24, 1239 (1995).
3. W.E. Tennant and C. Cabelli, Mater. Res. Soc. Symp. Proc. 484, (Pittsburgh, PA: Mater. Res. Soc., 1998), p. 221.
4. R.G. Humphreys, Infrared Phys. 26, 337 (1986).
5. W. van Roosbroeck, and W. Schockley, Phys. Rev. 94, 1558 (1954).