Del Re, Giuseppe. "Complexity, Organization, Information." In Origins, Time and Complexity, edited by George Coyne, Karl Schmitz-Moormann, Christoph Wassermann. Geneva, Switzerland: Labor et Fides (1994) 83-92.
Ford, Joseph. "What Is Chaos, That We Should Be Mindful of It?" In The New Physics, edited by Paul Davies. Cambridge: Cambridge University Press (1989) 348-372.