TY  - JOUR
AU  - V. Kh. Kovachev
TI  - Some bilinear invariants of two-dimensional autonomous systems of ordinary differential equations with rational right-hand side
JO  - Differencialʹnye uravneniâ
PY  - 1985
SP  - 331
EP  - 334
VL  - 21
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1985_21_2_a21/
LA  - ru
ID  - DE_1985_21_2_a21
ER  -