1. Multiple positive radial solutions for a Dirich - let problem involving the mean curvature operator in Minkowski space;Bereanu;Funct Anal,2013
2. Multiple positive solutions for a class of nonlinear boundary value problems;Brown;Math Anal Appl,1977
3. On the existence of positive solutions for a class of semilinear elliptic boundary value problems SIAM;Brown;Math Anal,1979
4. Cle ment Existence and multiplicity results for a semilinear elliptic eigen - value problem Norm Super Pisa;Sweers;Sci,1987
5. On multiple positive solutions of nonlinear elliptic eigenvalue problems Partial Differ;Hess;Commun Equ,1981