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| | Popular Science Bibliography (Site not responding. Last check: 2007-09-11) |
 | | Hofstadter, Douglas R. (1983a) 'Metamagical Themas: Virus-like and self-replicating structures', Scientific American, 248(1), January, pp. |
 | | Hofstadter, Douglas R. (1983b) 'Metamagical Themas: Computer Tournaments of the Prisoner's Dilemma Suggest How Co-operation Evolves', Scientific American, 248(5), May, pp. |
 | | Gu:th, Werner, Hofstadter, Douglas R. (1983c) 'Metamagical Themas: The Calculus of Co-operation is Tested Through a Lottery', Scientific American, 248(6), June, pp. |
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