Effects of combined harmonic and random excitations on a Brusselator model Yong Xu, Jinzhong Ma, Haiyan Wang, Yongge Li and Jürgen Kurths Eur. Phys. J. B, 90 10 (2017) 194 Published online: 16 October 2017 DOI: 10.1140/epjb/e2017-80076-9