TY  - JOUR
AU  - R. Boukoucha
TI  - Explicit expression for a first integral for some classes of two-dimensional differential systems
JO  - Sibirskie èlektronnye matematičeskie izvestiâ
PY  - 2017
SP  - 903
EP  - 913
VL  - 14
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SEMR_2017_14_a96/
LA  - en
ID  - SEMR_2017_14_a96
ER  -