Robust control for fractional variable-order chaotic systems with non-singular kernel C. J. Zuñiga-Aguilar, J. F. Gómez-Aguilar, R. F. Escobar-Jiménez and H. M. Romero-Ugalde Eur. Phys. J. Plus, 133 1 (2018) 13 Published online: 16 January 2018 DOI: 10.1140/epjp/i2018-11853-y