TY  - JOUR
AU  - M. T. Teryokhin
TI  - The limit cycles of a~second-order system of differential equations: the method of small forms
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 2009
SP  - 73
EP  - 82
IS  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_2009_8_a9/
LA  - ru
ID  - IVM_2009_8_a9
ER  -