1. Positive solutions of singular boundary value problems;Dalmasso;Nonlinear Anal. TMA,1996
2. D.R. Dunninger, H. Wang, Multiplicity of positive radial solutions for an elliptic system on an annulus domain, Nonlinear Anal. TMA, in press.
3. D. Guo, V. Lakshmikantham, Nonlinear Problems in Abstract Cones, Academic Press, Orlando, FL, 1988.
4. Positive solutions of semilinear equations with singularities;Lan;J. Differential Equations,1998
5. Y.H. Lee, Eigenvalues of singular boundary value problems and existence results for positive radial solutions of semilinear elliptic problems in exterior domains, Differential and Integral Equations 13 (2000), in press.