中国科学院数学与系统科学研究院期刊网
Three Solutions of p-Laplacian Equations Via a Critical Point Theorem of Ricceri
Chun-yan XUE, He-yu XU
Acta Mathematicae Applicatae Sinica(English Series) . 2014, (1): 171 -178 .  DOI: 10.1007/s10255-013-0227-1