[1] C.Z. Ning, H. Haken, Phys. Rev. A 41, 3827 (1990)

[2] A.D. Kiselev, J. Phys. Stud. 2, 3037 (1998)

[3] A. Rauh, L. Hannibal, N.B. Abraham, Physica D 99, 45 (1996) http://dx.doi.org/10.1016/S0167-2789(96)00129-7 [Crossref]

[4] S. Panchey, N.K. Vitanov, J. Calcutta Math. Soc. 1, 121 (2005)

[5] E.E. Mahmoud, G.M. Mahmoud, Chaotic and Hyperchaotic Nonlinear Systems (Lambert Academic Publishing, Germany, 2011)

[6] C. Liu, T. Liu, L. Liu, K. Liu, Chaos Soliton. Fract. 22, 1031 (2004) http://dx.doi.org/10.1016/j.chaos.2004.02.060 [Crossref]

[7] X. Wang, M. Wang, Chaos 17, 1 (2007)

[8] X. Gao, Appl. Mech. Mater. 1327, 1327 (2011) http://dx.doi.org/10.4028/www.scientific.net/AMM.55-57.1327 [Crossref]

[9] E.E. Mahmoud, Math. Comput. Model. 55, 1951 (2012) http://dx.doi.org/10.1016/j.mcm.2011.11.053 [Crossref]

[10] R.W. Ibrahim, Abstr. Appl. Anal. 127103, 1 (2013)

[11] H. Haken, Phys. Lett. A 53, 77 (1975) http://dx.doi.org/10.1016/0375-9601(75)90353-9 [Crossref]

[12] I. Podlubny, Fractional Differential Equations (Academic Press, London and New York, 1999)

[13] A.A. Kilbas, H.M. Srivastava, J.J. Trujillo, Theory and applications of fractional differential equations, (Elsevier, North-Holland, 2006)

[14] D. Matignon, Proceedings of the IMACS-SMC’96, 2 (1996)

## Comments (0)