Coherence resonance and stochastic synchronization in a nonlinear circuit near a subcritical Hopf bifurcationAnna Zakharova, Alexey Feoktistov, Tatyana Vadivasova and Eckehard SchöllEur. Phys. J. Special Topics, 222 10 (2013) 2481-2495DOI: https://doi.org/10.1140/epjst/e2013-02031-x