A correspondence between the models of Hodgkin-Huxley and FitzHugh-Nagumo revisited Eugene B. Postnikov and Olga V. Titkova Eur. Phys. J. Plus, 131 11 (2016) 411 Published online: 24 November 2016 DOI: 10.1140/epjp/i2016-16411-1