1. Nonlinear Differential Equations in Ordered Spaces;Carl,2000
2. Elliptic problems with lack of compactness via a new fixed point theorem;Carl;J. Differential Equations,2002
3. Existence results for implicit functional parabolic problems;Carl;Dynamic Systems Appl.,2002
4. Existence results for equations in ordered Hilbert spaces and elliptic BVP's;Carl;Nonlinear Funct. Anal. Appl.,2002