Interspike-interval correlations induced by two-state switching in an excitable systemTilo Schwalger, Jordi Tiana-Alsina, M. C. Torrent, Jordi Garcia-Ojalvo and Benjamin LindnerEPL, 99 1 (2012) 10004DOI: https://doi.org/10.1209/0295-5075/99/10004