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Raul Nistal, Manuel de la Sen, Santiago Alonso-Quesada, Asier Ibeas       On the periodic solutions of a generalized SVEIR model under impulsive vaccination       Applied Mathematical Sciences, Vol. 8, 2014, no. 15, 701-715
      http://dx.doi.org/10.12988/ams.2014.312714
Copyright © 2014 Raul Nistal et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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