中国科学院数学与系统科学研究院期刊网
AMS
Stability of Symmetric Closed Characteristics on Symmetric Compact Convex Hypersurfaces in R2n under a Pinching Condition
Hui LIU
Acta Mathematica Sinica . 2012, (5): 885 -900 .  DOI: 10.1007/s10114-011-0494-9