Keren Saggie-Wexler Alon Keinan Eytan Ruppin Neural Processing of Counting in Evolved Spiking and McCulloch-Pitts Agents. 1-16 2006 12 Artificial Life 1 http://dx.doi.org/10.1162/106454606775186428 db/journals/alife/alife12.html#Saggie-WexlerKR06