Editing Limit cycle (section)

==Further reading==

* {{cite book |author=Steven H. Strogatz |title=Nonlinear Dynamics and Chaos: With Applications to Physics, Biology, Chemistry, and Engineering |publisher=Avalon |date=2014 |isbn=9780813349114}}
* {{cite book |author=M. Vidyasagar |title=Nonlinear Systems Analysis |edition=Second |publisher=SIAM |date=2002 |isbn=9780898715262}}
* Philip Hartman, "Ordinary Differential Equation", Society for Industrial and Applied Mathematics, 2002.
* Witold Hurewicz, "Lectures on Ordinary Differential Equations", Dover, 2002.
* Solomon Lefschetz, "Differential Equations: Geometric Theory", Dover, 2005.
* Lawrence Perko, "Differential Equations and Dynamical Systems", Springer-Verlag, 2006.
* Arthur Mattuck, Limit Cycles: Existence and Non-existence Criteria, MIT Open Courseware http://videolectures.net/mit1803s06_mattuck_lec32/#