1. V. A. Shchukin and D. Bimberg, Rev. Mod. Phys. 71, 1125 (1999).
2. O. A. Shegai, K. S. Zhuravlev, V. A. Markov, et al., Fiz. Tekh. Poluprovodn. (St. Petersburg) 34, 1363 (2000) [Semiconductors 34, 1311 (2000)].
3. O. A. Shegai, V. A. Markov, A. I. Nikiforov, et al., Phys. Low-Dimens. Semicond. Struct., Nos. 1–2, 261 (2002).
4. B. I. Shklovskii and A. L. Éfros, Electronic Properties of Doped Semiconductors (Nauka, Moscow, 1979; Springer, New York, 1984).
5. V. A. Gaisler, D. A. Ténné, N. T. Moshegov, et al., Fiz. Tverd. Tela (St. Petersburg) 38, 2242 (1996) [Phys. Solid State 38, 1235 (1996)].