References for Abram Naumovich Trakhtman

Version for printing


  1. M du Sautoy, Sexy maths: ditch the GPS, just follow the colour code, The Times (4 March 2009).
  2. Israeli ex-security guard solves 38-year-old math problem, Haaretz Newspaper (20 March 2008).
  3. A Heller, Security guard solves 38-year-old maths poser, The Guardian (Friday 21 March 2008).
  4. R Highfield, Directions from anywhere: maths problem solved, The Telegraph (21 March 2008).
  5. K Kloosterman, Israeli immigrant solves 38-year-old math problem, ISRAEL21c (18 February 2008).
  6. J Siegel-Itzkovich, Russian immigrant solves math puzzle, The Jerusalem Post (8 February, 2008).

JOC/EFR July 2009

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