Ball, Philip, Brian Goodwin, Ian Stewart, and Brian Hanson. "A Conversation with Three Scientists: Physicist Philip Ball, Biologist Brian Goodwin and Mathematician Ian Stewart." Katarxis Nº 3: New Science, New Urbanism, New Architecture? 3, no. 3 (2004).

Ball, Philip. Critical mass : how one thing leads to another. New York: Farrar, Straus and Giroux, 2004.