[1] 安德鲁·霍奇斯,Alan Turing: The Enigma(Simon & Schuster,1983),95。 [2] 霍奇斯,Alan Turing,113。 [3] 同上。 [4] 阿兰·图灵,“Systems of Logic Based on Ordinals”,Proceedings of the London Mat...
[1] 安德鲁·霍奇斯,Alan Turing: The Enigma(Simon & Schuster,1983),138。 [2] David Kahn,Seizing the Enigma: The Race to Break the German U-Boat Codes,1939-1943(Houghton-Mifflin,1991),ch...