1. Spitzer etal., Proc. 14th IEEE PVSC (1980), pp. 857–862.
2. E. Yablonovitch, Proc. 15th IEEE PVSC (1981), pp. 465–470.
3. Knobloch etal., Proc. 6th EC PVSC (1985), pp. 285–289.
4. Mauk and Barnett, Proc. 18th IEEE PVSC (1985), pp. 192–197.
5. M. G. Mauk, Ph.D. Dissertation U. of Delaware, 1986.