Marshall McLuhan, Bruce R. Powers (1989). “The global village: transformations in world life and media in the 21st century”, Oxford University Press, USA
Charles Babbage (1830). “Reflections on the Decline of Science in England: And on Some of Its Causes, by Charles Babbage (1830). To which is Added On the Alleged Decline of Science in England, by a Foreigner (Gerard Moll) with a Foreword by Michael Faraday (1831).”, p.17