References

A STUDY OF A VAN DER POL EQUATION


[1] I. Bendixson, Sur les curbes definies par des equations differentielles, Acta Math. 24 (1901), 1-88.

[2] A. Gasull and H. Giacomini, Some applications of the extended Bendixson-Dulac theorem.

http://arxiv.org/abs/1305.3402

[3] A. Liénard, Étude des oscillations entrenues, Rev. Génerale de l’Électricité 23 (1928), 946-954.

[4] C. McCluskey and J. Muldowney, Bendixson-Dulac criteria for différence equations, J. Dyn. Diff. Equ. 10 (1998), 567-575.

[5] L. Perko, Différential Equations and Dynamical Systems, Springer, Berlin, 2006.

[6] O. Osuna and G. Villaseñor, On the Dulac functions, Qual. Theory Dyn. Syst. 10(1) (2011), 43-49.

[7] E. Saéz and I. Szánto, On the construction of certain Dulac Function, IEEE Trans. Automat. Control 33(9) (1988), 856.

[8] L. Stephen, Dynamical Systems with Applications using MAPLE, Birkhäuser, Boston, 2001.

[9] S. Strogatz, Nonlinear Dynamics and Chaos, Addison-Wesley, Reading, 1994.