Pronchatov V E

Publications in Math-Net.Ru

1. On an error estimate for the averaging method in a two-frequency problem
   
   Mat. Sb. (N.S.), 134(176):1(9) (1987),  28–41
2. An error estimate for the averaging method in a two-frequency problem
   
   Mat. Sb. (N.S.), 122(164):2(10) (1983),  245–264