Vannevar Bush, “As We May Think”, The Atlantic Monthly (Boston), 176, july 1945; ora in James M. Nyce, Paul Kahn (eds.), From Memex to Hypertext: Vannevar Bush and the Mind’s Machine, Academic Press, Boston 1991.
Douglas Engelbart, Augmenting Human Intellect: A Conceptual Framework, Summary Report Prepared for Direction of Information Science Air Force Office of Scientific Research, Stanford Research Institute, October 1962. Vedi in Randall Packer, Ken Jordan (eds.), Multimedia. From Wagner to Virtual Reality, W.W. Norton & Company, New York, 2001.