TY  - JOUR
AU  - I. K. Lipenkov
TI  - The type $D$ curves of the differential equation $(x+\xi)(x+\eta)yy'=P_3(x,y)$ which arise from a second order closed curve
JO  - Differencialʹnye uravneniâ
PY  - 1969
SP  - 1830
EP  - 1835
VL  - 5
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1969_5_10_a8/
LA  - ru
ID  - DE_1969_5_10_a8
ER  -