Lance R. Williams. Programs as Polypeptides. In Paul Andrews, Leo S. D. Caves, René Doursat, Simon J. Hickinbotham, Fiona A. C. Polack, Susan Stepney, Tim Taylor, Jon Timmis, editors, Proceedings of the Thirteenth European Conference Artificial Life, ECAL 2015, York, UK, July 20-24, 2015. pages 150-157, MIT Press, 2015. [doi]