[1] | Barrio, R.; Serrano, S.: Physica D: Nonlinear phenomena, Physica D: Nonlinear phenomena 229, No. 1, 43 (2007) |

[2] | Hinke, M. O.; Bernd, K.: Computers and graphics, Computers and graphics 26, No. 5, 815 (2002) |

[3] | Pishkenari, H. N.; Shahrokhi, M.; Mahboobi, S. H.: Chaos, solitons and fractals, Chaos, solitons and fractals 32, No. 2, 832 (2007) |

[4] | Galias, Z.; Zgliczyński, P.: Physica D: Nonlinear phenomena, Physica D: Nonlinear phenomena 115, No. 3-4, 165 (1998) |

[5] | Guellal, S.; Grimalt, P.; Cherruault, Y.: Computers and mathematics with applications, Computers and mathematics with applications 33, No. 3, 25 (1997) |

[6] | Schmutz, M.; Rueff, M.: Physica D: Nonlinear phenomena, Physica D: Nonlinear phenomena 11, No. 1-2, 167 (1984) |

[7] | Pivka, L.; Wu, C. W.; Huang, Anshan: Journal of the franklin institute, Journal of the franklin institute 331, No. 6, 705 (1994) |

[8] | Tlelo-Cuautle, E.; Muñoz-Pacheco, Jesús M.: Applied mathematics and computation, Applied mathematics and computation 190, No. 2, 1526 (2007) |

[9] | Yassen, M. T.: Applied mathematics and computation, Applied mathematics and computation 131, No. 1, 171 (2002) |

[10] | Jose, A.; Julio, S.; Puebla, Hector: Physics letters A, Physics letters A 338, No. 2, 128 (2005) |

[11] | Awad, E.; Bukhari, F.: Applied mathematics and computation, Applied mathematics and computation 144, No. 2-3, 337 (2003) |

[12] | Baek, J.; Lee, H.; Kim, S.; Park, M.: Physics letters A, Physics letters A 373, No. 47, 4368 (2009) |

[13] | Yang, Z. Q.; Lu, Q. S.; Li, L.: Chaos, solitons and fractals, Chaos, solitons and fractals 27, No. 3, 689 (2006) |

[14] | Wang, H. X.; Lu, Q. S.; Wang, Q. Y.: Communications in nonlinear science and numerical simulation, Communications in nonlinear science and numerical simulation 13, No. 8, 1668 (2008) |

[15] | De La Parra, R. Bravo; Arino, O.; Sánchez, E.; Auger, P.: Mathematical and computer modelling, Mathematical and computer modelling 31, No. 4-5, 17 (2000) |

[16] | Innocenti, M.; Greco, L.; Pollini, L.: Automatica, Automatica 39, No. 2, 273 (2003) |

[17] | Han, X.; Jiang, B.; Bi, Q.: Acta physica sinica, Acta physica sinica 58, No. 7, 4408 (2009) |

[18] | Han, X.; Jiang, B.; Bi, Q.: Physics letters A, Physics letters A 373, 3643 (2009) |