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On 25 Feb 2018 at 14:53 GMT DK Clews wrote:
Jewish Encyclopedia.com: http://jewishencyclopedia.com/articles/9813-levi-ben-gershon
School of Mathematics and Statistics University of St Andrews, Scotland: Levi dben Gerson biography: http://www-history.mcs.st-andrews.ac.uk/Biographies/Levi.html - has a link to their list of references as well as a visualization of his lifeline on a timeline of mathematicians... very interesting.