Modulating coherence resonance in non-excitable systems by time-delayed feedbackPaul M. Geffert, Anna Zakharova, Andrea Vüllings, Wolfram Just and Eckehard SchöllEur. Phys. J. B, 87 12 (2014) 291DOI: https://doi.org/10.1140/epjb/e2014-50541-2