Braun P A

Publications in Math-Net.Ru

1. Quasienergies of an anharmonic oscillator in parametric resonance
   
   TMF, 41:3 (1979),  336–345
2. WKB method for three-term recursion relations and quasienergies of an anharmonic oscillator
   
   TMF, 37:3 (1978),  355–370