Akopyan R V

Publications in Math-Net.Ru

1. On the regularity of spectral function of J-unitary J-dissipative operator
   
   Proceedings of the YSU, Physical and Mathematical Sciences, 1988, no. 2,  22–30
2. Perturbation theory for $J$-positive operators
   
   Funktsional. Anal. i Prilozhen., 9:2 (1975),  61–62