Shevel' A V

Publications in Math-Net.Ru

1. Mechanism of a population inversion between the ${}^4I_{11/2}$ and ${}^4I_{13/2}$ levels of the $Er^{3+}$ ion in $Y_3Al_5O_{12}$ crystals
   
   Kvantovaya Elektronika, 7:4 (1980),  749–753