1 23 Nonlinear Dynamics An International Journal of Nonlinear Dynamics and Chaos in Engineering Systems ISSN 0924-090X Volume 80 Combined 1-2 Nonlinear Dyn (2015) 80:845-854 DOI 10.1007/s11071-015-1910-y Multi-switching combination synchronization of chaotic systems U. E. Vincent, A. O. Saseyi & P. V. E. McClintock