中国科学院数学与系统科学研究院期刊网
Multiple Solutions for a Fourth-order Nonlinear Elliptic Problem with Combined Nonlinearities
PEI Ruichang, ZHANG Jihui
Acta Mathematicae Applicatae Sinica . 2019, (2): 167 -178 .  DOI: 10.12387/C2019014