1. A. V. Eletskiĭ, Usp. Fiz. Nauk 177(3), 233 (2007) [Phys.—Usp. 50 (3), 225 (2007)].
2. S. Yu. Davydov, A. A. Lebedev, N. Yu. Smirnova, Fiz. Tverd. Tela (St. Petersburg) 51(3), 452 (2009) [Phys. Solid State 51 (3), 481 (2009)].
3. W. Harrison, Electronic Structure and Properties of Solids (Freeman, San Francisco, CA, United States, 1980; Mir, Moscow, 1983), Vol. 1.
4. W. A. Harrison, Phys. Rev. B: Condens. Matter 27, 3592 (1983).
5. W. A. Harrison, Phys. Rev. B: Condens. Matter 31, 2121 (1985).