Tomonari Hasegawa Toshimichi Saito Bifurcation and Windows in a Simple Piecewise Linear Chaotic Spiking Neuron. 837-843 2008 ICONIP (1) http://dx.doi.org/10.1007/978-3-642-02490-0_102 conf/iconip/2009-1 db/conf/iconip/iconip2009-1.html#HasegawaS09