@book{strogatz2008nonlinear,
  title={Nonlinear Dynamics and Chaos: With Applications to Physics, Biology, Chemistry, and Engineering},
  author={Strogatz, S.H.},
  isbn={9780786723959},
  series={Studies in nonlinearity},
  url={https://books.google.es/books?id=dTvTzBeRn3cC},
  year={2008},
  publisher={Westview Press}
}

@book{strogatz1994nonlinear,
  title={Nonlinear Dynamics and Chaos: With Applications to Physics, Biology, Chemistry, and Engineering},
  author={Strogatz, S.H.},
  isbn={9780738204536},
  lccn={93006166},
  series={Advanced book program},
  url={https://books.google.es/books?id=FIYHiBLWCJMC},
  year={1994},
  publisher={Westview Press}
}