Spirtus, V. B. “Features of the Dynamics of Seismic Activity in Models of the FitzHugh-Nagumo Type”. Geofizicheskiy Zhurnal, vol. 33, no. 2, Apr. 2011, pp. 57-63, doi:10.24028/gzh.0203-3100.v33i2.2011.117295.