1. M. Watanabe,Solid State Technology 1991,34, 69.
2. R. E. Kaim,Solid State Technology 1990,33, 103.
3. G. Hobler, H. Pötzl, L. Palmetshofer, R. Schork, J. Lorenz, G. Gara, G. Stingeder,Proc. ESSDERC 90 (W. Eccleston, P. J. Rosser, eds.) Adam Hilger, Bristol, Philadelphia, New York, 1990, p. 217.
4. N. L. Turner, M. Current, T. C. Smith, D. Crane,Solid State Technology 1985,28, 163.
5. G. Hobler, H. Pötzl, L. Palmetshofer, R. Schork, J. Lorenz, C. Tian, S. Gara, G. Stingeder,COMPEL The International Journal for Computation and Mathematics in Electrical and Electronic Engineering,1991, in press.