Estimates for the Upper Bounds of the First Eigenvalue on Submanifolds
祁锋, 于霖泉, 雒秋明
Estimates for the Upper Bounds of the First Eigenvalue on Submanifolds
Qi Feng, Yu Linquan, Luo Qiuming
数学季刊 . 1994, (2): 40 -43 .