中国科学院数学与系统科学研究院期刊网
AMS
Relative Superlinearity Implies Infinitely Many Solutions to Sturm-Liouville BVPs with Laplacian Type Operators
Wei Gao GE, Wei Ping SUN
Acta Mathematica Sinica . 2005, (5): 1015 -1026 .  DOI: 10.1007/s10114-005-0565-x