TY  - JOUR
AU  - D. S. Ushkho
TI  - Limit cycles of an autonomous system with algebraic right-hand sides
JO  - Differencialʹnye uravneniâ
PY  - 1991
SP  - 1915
EP  - 1925
VL  - 27
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1991_27_11_a7/
LA  - ru
ID  - DE_1991_27_11_a7
ER  -