Syroid I P

Publications in Math-Net.Ru

1. Sufficient conditions for the absence of spectral singularities in a nonselfadjoint Schrödinger operator in terms of potential
   
   Sibirsk. Mat. Zh., 22:1 (1981),  151–157
2. Conditions under which an operator obtained as a perturbation of multiplication by the independent variable is spectral
   
   Mat. Zametki, 13:2 (1973),  289–296