%0 Journal Article %A Liu, Chun-Gen %A Long, Yiming %T Hyperbolic characteristics on star-shaped hypersurfaces %J Annales de l'I.H.P. Analyse non linéaire %D 1999 %P 725-746 %V 16 %N 6 %I Gauthier-Villars %G en %F AIHPC_1999__16_6_725_0