Allen H. Brady. The busy beaver game and the meaning of life. The universal Turing machine, A half-century survey, edited by Rolf Herken, Kammerer & Unverzagt, Hamburg and Berlin, and Oxford University Press, Oxford and New York, 1988. pp. 259–277.
Arnold Oberschelp · Journal of Symbolic Logic · 1991
Allen H. Brady. The busy beaver game and the meaning of life. The universal Turing machine, A half-century survey, edited by Rolf Herken, Kammerer & Unverzagt, Hamburg and Berlin, and Oxford University Press, Oxford and New York, 1988. pp. 259–277. - Volume 56 Issue 3