TY  - JOUR
AU  - Yu. S. Ilyashenko
TI  - An example of eqations $\frac{dw}{dz}=\frac{P_n(z,w)}{Q_n(z,w)}$ having a~countable number of limit cycles and arbitrarily large Petrovskii--Landis genus
JO  - Sbornik. Mathematics
PY  - 1969
SP  - 365
EP  - 378
VL  - 9
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1969_9_3_a5/
LA  - en
ID  - SM_1969_9_3_a5
ER  -