Existence of Periodic Solutions for Neutral Nonlinear Dynamic Systems with Delay Using Shift Operators and Krasnoselskii’s Fixed Point Theorem. Al-Mukhtar Journal of Basic Sciences, [S. l.], v. 23, n. 3, p. 124–138, 2026. DOI: 10.54172/rjkmxv77. Disponível em: https://mdp.omu.edu.ly/journals/index.php/mjbs/article/view/1416. Acesso em: 10 jan. 2026.