1. M. Lannoo, J. Bourgoin, Point Defect in Semiconductor I (Springer, Berlin, 1981), p. 256
2. K.A. Kikoin, Electronic Properties of Transition Metal Impurities in Semiconductors (Energoatomizdat, Moscow, 1991), p. 301
3. S.M. Yakubenya, Fiz. Tverd. Tela 34, 345 (1992)
4. P.A. Aleksandrov, S.M. Yakubenya, in Proceedings of International Conference on Science and Technology of Dejects Control in Semiconductors, vol. 2, ed. by K. Sumino (Elsevier Science Publishers, Yohogama, 1989), p. 1605
5. S.M. Yakubenya, Fiz. Tverd. Tela 34, 2753 (1992)