1. Sobolev Spaces;Adams,1975
2. Characterizations of the range of some nonlinear operators and applications to boundary value problems;Brezis;Annali Scu. norm. sup. Pisa,1978
3. Generalized periodic solutions of nonlinear telegraph equations;Fucik;Nonlinear Analysis,1978
4. Periodic solutions of nonlinear telegraph equations;Mawhin,1977
5. Strongly nonlinear perturbations of nonnegative boundary value problems with kernel;McKenna;J. diff. Eqns,1978