TY  - JOUR
AU  - K. K. Kammatov
TI  - Oscillations in certain essentially nonlinear systems
JO  - Differencialʹnye uravneniâ
PY  - 1971
SP  - 997
EP  - 1006
VL  - 7
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1971_7_6_a5/
LA  - ru
ID  - DE_1971_7_6_a5
ER  -