TY  - JOUR
AU  - Li, Chengzhi
AU  - Rousseau, Christiane
AU  - Wang, Xian
TI  - A Simple Proof for the Unicity of the Limit Cycle in the Bogdanov-Takens System
JO  - Canadian mathematical bulletin
PY  - 1990
SP  - 84
EP  - 92
VL  - 33
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1990-015-3/
DO  - 10.4153/CMB-1990-015-3
ID  - 10_4153_CMB_1990_015_3
ER  -