Ahmad Y. Al-Hassan & Donald R. Hill: Islamic Technology: An Illustrated History, s. 54–55. Cambridge University Press, 1986. Teoksen verkkoversio.
White Jr., Lynn: Medieval Technology and Social Change, s. 170. "However, that al-Jazari did not entirely grasp the meaning of the crank for joining reciprocating with rotary motion is shown by his extraordinarily complex pump powered through a cog-wheel mounted eccentrically on its axle.". Oxford, 1962. Teoksen verkkoversio.
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