1. Al-Khowârizm (Abu Ja'far Mohammed Ibn Mûsâ al-Khowârizm). 1202.Kitab al jabr w'al muqabala, Vol. 1, 1Pisa, Italy: (Addison Wesley) and by Leonardo Pisano Filius Bonacii, or Fibonacci. Khowârizm (today: Khiva, Turkmenistan), 825 A.D. Quoted in: Knuth,Fundamental Algorithms
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