Susan Stepney Simon J. Hickinbotham 192-199 2016 ALIFE https://doi.org/10.7551/978-0-262-33936-0-ch038 https://doi.org/10.1162/978-0-262-33936-0-ch038 conf/alife/2016 db/conf/alife/alife2016.html#StepneyH16