V. P. Zhukov, V. N. Krasilnikov, L. A. Perelyaeva, I. V. Baklanova, I. R. Shein, “Electronic band structure and optical absorption of nanotubular zinc oxide doped with Iron, Cobalt, or Copper”, Fizika Tverdogo Tela, 55:12 (2013), 2331–2339; Phys. Solid State, 55:12 (2013), 2450–2458
