On some functional-differential equations. S. Czerwik — 1976 Publications de l'Institut Mathématique [Elektronische Ressource]
Note on the differentiability of solutions of class Cr of a functional equation with respect to a parameter. S. Czerwik — 1975 Aequationes mathematicae
On the continuous dependence of solutions of some functional equations on given functions S. Czerwik — 1971 Annales Polonici Mathematici
On the differentiability of solutions of a functional equation with respect to a parameter S. Czerwik — 1971 Annales Polonici Mathematici
Existence, uniqueness and continuous dependence on the parameter of solutions of a system of differential equations with deviating argument S. Czerwik — 1977 Annales Polonici Mathematici
The existence of global solutions of a functional-differential equation S. Czerwik — 1976 Colloquium Mathematicae
On sign-preserving solutions of a linear functional equation S. Czerwik — 1968 Annales Polonici Mathematici
Solutions of class C r with respect to the parameter of a linear functional equation S. Czerwik — 1974 Commentationes Mathematicae The article contains no abstract
On a differential equation with deviating argument S. Czerwik — 1977 Commentationes Mathematicae The article contains no abstract
On some properties of solutions of a functional equation with parameter S. Czerwik — 1974 Commentationes Mathematicae The article contains no abstract
On the existence of a Lipschitz solution of a functional equation S. Czerwik — 1976 Matematički Vesnik
On the stability of the quadratic functional equation in topological spaces. Adam, M.; Czerwik, S. — 2007 Banach Journal of Mathematical Analysis [electronic only]