References for Ahmed ibn Yusuf

Version for printing
  1. D V Schrader, Biography in Dictionary of Scientific Biography (New York 1970-1990).
    http://www.encyclopedia.com/doc/1G2-2830900059.html

Articles:

  1. H L L Busard and P S van Koningsveld, Der 'Liber de arcubus similibus' des Ahmed ibn Jusuf, Ann. of Sci. 30 (1973), 381-406.
  2. M Steinschneider, Yusuf ben Ibrahim und Ahmed ibn Yusuf, Bibliotheca mathematica (1888), 49-117.

JOC/EFR November 1999

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