1. A resonance problem in which the nonlinearity may grow linearly;Ahmad,1984
2. Existence of solutions of nonlinear differential equations;Cesari,1983
3. Surjectivity of operators involving linear noninvertible part and nonlinear compact perturbation;Fucik;Funkcial. Ekvac.,1974
4. On functional equations of Fredholm and Hammerstein type with applications to existence of periodic solutions of certain ordinary differential equations;Gupta;J. Integral Equations,1981
5. Remarks on some quasilinear elliptic equations;Kazdan;Comm. Pure Appl. Math.,1975