Tunc, Cemil2025-05-102025-05-1020090101-820510.1590/S1807-030220090002000052-s2.0-70350057753https://doi.org/10.1590/S1807-03022009000200005https://hdl.handle.net/20.500.14720/9590Tunc, Cemil/0000-0003-2909-8753In this paper, we improve some boundedness results, which have been obtained with respect to nonlinear differential equations of fifth order without delay, to a certain functional differential equation with constant delay. We give an illustrative example and also verify our main result by means of Liaponov tecnique.eninfo:eu-repo/semantics/openAccessBoundednessLiapunov FunctionalNonlinear Differential Equations Of FifthArticle282N/AN/A213230WOS:000268141300005