TY  - JOUR
AU  - Nguyên van Dao
TI  - On the oscillations of systems which are nearly essentially nonlinear
JO  - Doklady Akademii Nauk
PY  - 1970
SP  - 1004
EP  - 1006
VL  - 192
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1970_192_5_a14/
LA  - ru
ID  - DAN_1970_192_5_a14
ER  -