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Infinitely Many Periodic Solutions for a Class of Perturbed Second-Order Differential Equations with Impulses |
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| Authors: | Shapour Heidarkhani Massimiliano Ferrara Amjad Salari |
| Institution: | 1. Department of Mathematics, Faculty of Sciences, Razi University, 67149, Kermanshah, Iran 2. Department of Law and Economics, University Mediterranea of Reggio Calabria, Via dei Bianchi, 2, 89131, Reggio Calabria, Italy |
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