References for Ahmed ibn Yusuf

  1. D V Schrader, Biography in Dictionary of Scientific Biography (New York 1970-1990).
    See THIS LINK.


  2. 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.
  3. M Steinschneider, Yusuf ben Ibrahim und Ahmed ibn Yusuf, Bibliotheca mathematica (1888), 49-117.