TY  - JOUR
AU  - I. A. Konoplyannik
TI  - A certain class of third order systems without movable critical points
JO  - Differencialʹnye uravneniâ
PY  - 1975
SP  - 1508
EP  - 1511
VL  - 11
IS  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1975_11_8_a18/
LA  - ru
ID  - DE_1975_11_8_a18
ER  -