References for Jan de Witt

  1. J B Easton, Biography in Dictionary of Scientific Biography (New York 1970-1990).
    http://www.encyclopedia.com/topic/Jan_de_Witt.aspx
  2. Biography in Encyclopaedia Britannica.
    http://www.britannica.com/eb/article-9077291/Johan-de-Witt

Books:

  1. N Japikse, Johan de Witt (Amsterdam, 1915).

Articles:

  1. A W Grootendorst, The 'conic sections' according to Johan de Witt (Dutch), in Summer course 1995 : conic sections and quadratic forms (Amsterdam, 1995), 15-55.

August 2006

MacTutor History of Mathematics
[http://www-history.mcs.st-andrews.ac.uk/References/De_Witt.html]