Shirikyan R A

Publications in Math-Net.Ru

1. The spectrum of nonselfadjoint ordinary differential operators of higher order
   
   Differ. Uravn., 8:7 (1972),  1214–1224
2. The spectrum of nonselfadjoint differential operators
   
   Dokl. Akad. Nauk SSSR, 183:4 (1968),  791–792
3. Asymptotic methods in the theory of one-dimensional singular differential operators of odd order
   
   Differ. Uravn., 3:11 (1967),  1942–1956