TY  - JOUR
AU  - V. N. Laptinskii
TI  - Fourier approximations of periodic solutions of nonlinear differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1985
SP  - 1899
EP  - 1904
VL  - 21
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1985_21_11_a6/
LA  - ru
ID  - DE_1985_21_11_a6
ER  -