On differential inequality for non-linear integro-differential equation with retardation J. Morchało — 1980 Commentationes Mathematicae The article contains no abstract
A functional differential inequality for linear integro-differential equation with retardation J. Morchalo — 1980 Commentationes Mathematicae The article contains no abstract
Stability and Asymptotic Behavior for Certain Systems of Delay Difference Equations J. Morchało — 1997 Publications de l'Institut Mathématique