中国科学院数学与系统科学研究院期刊网
Sharp Upper Bounds for λ1Lr of Immersed Hypersurfaces and Their Stability in Space Forms
Ru Shan WANG
Acta Mathematica Sinica . 2008, (5): 749 -760 .  DOI: 10.1007/s10114-007-6322-6