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Periodic Solutions to Reversible Second Order Autonomous Systems with Commensurate Delays. (arXiv:2007.09166v1 [math.DS]) http://arxiv.org/abs/2007.09166
Periodic Solutions to Reversible Second Order Autonomous Systems with Commensurate Delays. (arXiv:2007.09166v1 [math.DS]) http://arxiv.org/abs/2007.09166