中国科学院数学与系统科学研究院期刊网
AMS
Existence of multiple positive solutions for - Du = lu + u\fracN + 2N - 2 + mf( x )*?Δu=λu+uN?2N+2+μf(x)*
Deng Yinbing
Acta Mathematica Sinica . 1993, (3): 311 -320 .  DOI: 10.1007/BF02582909