Goldbloom, Anthony (19 April 2012). "Winning in Real Time". The Economist Ideas Blog. Archived from the original on 26 July 2011. Retrieved 26 November 2011.
Goldbloom, Anthony (19 April 2012). "Winning in Real Time". The Economist Ideas Blog. Archived from the original on 26 July 2011. Retrieved 26 November 2011.