TY  - JOUR
AU  - A. A. Kadirov
TI  - Singular points of differential equations with nonoriented trajectories on a plane
JO  - Differencialʹnye uravneniâ
PY  - 1983
SP  - 2039
EP  - 2048
VL  - 19
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1983_19_12_a2/
LA  - ru
ID  - DE_1983_19_12_a2
ER  -