1. Nonlinear Superposition Operators;Appell,1990
2. A generalization of the Carathéodory theory of differential equations;Karták;Czechoslovak Math. J.,1967
3. On Carathéodory operators;Karták;Czechoslovak Math. J.,1967
4. Nonlinear operators in function Banach spaces;Kozłowski;Comment. Math. Prace. Mat.,1980
5. Locally defined operators in the space of differentiable functions;Lichawski;Bull. Polish Acad. Sci. Math.,1989