Turing, A.M. «On Computable Numbers, with an Application to the Entscheidungsproblem». Proceedings of the London Mathematical Society, 42, 1936, p. 230–65. DOI: 10.1112/plms/s2-42.1.230. ISSN: 0024-6115. (i Turing, A.M. «On Computable Numbers, with an Application to the Entscheidungsproblem: A correction». Proceedings of the London Mathematical Society, 43, 1938, p. 544–6. DOI: 10.1112/plms/s2-43.6.544.)
Paul Gray, "Alan Turing," Time Magazine's Most Important People of the Century, p.2 «Computer Scientist: ALAN TURING - TIME». Arxivat de l'original el 2008-08-22. [Consulta: 19 juliol 2012].(en anglès)
Paul Gray, "Alan Turing," Time Magazine's Most Important People of the Century, p.2 «Computer Scientist: ALAN TURING - TIME». Arxivat de l'original el 2008-08-22. [Consulta: 19 juliol 2012].(en anglès)
Turing, A.M. «On Computable Numbers, with an Application to the Entscheidungsproblem». Proceedings of the London Mathematical Society, 42, 1936, p. 230–65. DOI: 10.1112/plms/s2-42.1.230. ISSN: 0024-6115. (i Turing, A.M. «On Computable Numbers, with an Application to the Entscheidungsproblem: A correction». Proceedings of the London Mathematical Society, 43, 1938, p. 544–6. DOI: 10.1112/plms/s2-43.6.544.)