Shepeleva R P

Publications in Math-Net.Ru

1. Critical frequencies of canonical systems, invariant with respect to time reversal, with periodic coefficients
   
   Izv. Vyssh. Uchebn. Zaved. Mat., 1980, no. 9,  56–64
2. Critical frequencies of canonical fractional-periodic equations
   
   Sibirsk. Mat. Zh., 16:3 (1975),  612–622