%0 Journal Article %A Guoting Chen %A Duo Wang %A Jiazhong Yang %T Unique normal forms for Hopf-zero vector fields %J Comptes Rendus. Mathématique %D 2003 %P 345-348 %V 336 %N 4 %I Elsevier %R 10.1016/S1631-073X(03)00043-8 %G en %F CRMATH_2003__336_4_345_0