TY - JOUR AU - S. M. Tashpulatov TI - Spectra of the energy operator of three-electron systems in the impurity Hubbard model. Second doublet state JO - Contemporary Mathematics. Fundamental Directions PY - 2019 SP - 109 EP - 123 VL - 65 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMFD_2019_65_1_a9/ LA - ru ID - CMFD_2019_65_1_a9 ER -