1. M.Lannoo, J.Bourgoin:Point Defects in Semiconductors I, Springer Ser. Solid-State Sci.22 (Springer, Berlin, Heidelberg, New York 1981)
2. E.R.Weber, H.Ennen, U.Kaufmann, J.Windscheif, J.Schneider, T.Wosi?ski: Appl. Phys. Lett. (in press, 1982)
3. T.Wosi?ski, A.Morawski, T.Figielski: Appl. Phys. A (submitted)
4. D.V.Lang: InThermally Stimulated Relaxation in Solids, ed. by P.Br�unlich, Top. Appl. Phys.37 (Springer, Berlin, Heidelberg, New York 1979) Chap. 3
5. T.Wosi?ski: Phys. stat. sol. (a)60, K149 (1980)