@ARTICLE {27875, author={J. P. M. Mateus and P. Rebelo Rebelo and S. Rosa and CMS Silva and D. F. M. T. Torres}, doi={10.3934/dcdss.2018067}, journal={Discrete and Continuous Dynamical Systems - Series S}, title={Optimal control of non-autonomous SEIRS models with vaccination and treatment}, year={2018}, month={December}, volume={11}, number={6}, pages={1179-1199}, ISSN={1937-1179} }