Corporation Broad, William J. "Nuclear Pulse (II): Ensuring Delivery of the Doomsday Signal", Science. 5 June 1981 212: 1116–1120 Broad, William J. "Nuclear
The Irish Times, 31 August 2009, p.13. Clonan, Tom. "'Operation Armageddon' would have been doomsday - for Irish aggressors" 互联网档案馆的存檔,存档日期24 October 2010
Krogh Foreign Affairs Digital Archives (页面存档备份,存于互联网档案馆) Herman Kahn's Doomsday Machine Robert McNamara's "Mutual Deterrence" speech from 1967 (页面存档备份,存于互联网档案馆)