Eduardo-Luis Valiente-Bahoque, Ana-Magnolia Marin-Ramirez, Ruben-Dario Ortiz-Ortiz
      Poincare's map in a Van der Pol equation
      International Journal of Mathematical Analysis, Vol. 8, 2014, no. 59, 2939-2943
      http://dx.doi.org/10.12988/ijma.2014.411338

Copyright © 2014 Eduardo-Luis Valiente-Bahoque, Ana-Magnolia Marin-Ramirez and Ruben-Dario Ortiz-Ortiz. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.