Ge, Wei Gao et Sun, Wei Ping, Relative Superlinearity Implies Infinitely Many Solutions to Sturm-Liouville BVPs with Laplacian Type Operators, Acta mathematica Sinica. English series (Print) , 21(5), 2005, pp. 1015-1026
By the use of continuation theorems and the duality principle its proved that for both homogeneous and nonhomogeneous SturmLiouville boundary value problems with Laplacian type operators, relative superlinearity implies the existence of infinitely many solutions under a few weakly added conditions.