Phillips, Ana Lena (November–December 2011). "Crowdsourcing gender equity: Ada lovelace day, and its companion website, aims to raise the profile of women in science and technology". American Scientist. 99 (6): 463. doi:10.1511/2011.93.463. ISSN0003-0996.
Donald Routledge Hill, "Mechanical Engineering in the Medieval Near East", Scientific American, May 1991, pp. 64-9 (compare Donald Routledge Hill, Mechanical EngineeringArchived 2007-12-25 at the Wayback Machine)
Donald Routledge Hill, "Mechanical Engineering in the Medieval Near East", Scientific American, May 1991, pp. 64-9 (compare Donald Routledge Hill, Mechanical EngineeringArchived 2007-12-25 at the Wayback Machine)
Phillips, Ana Lena (November–December 2011). "Crowdsourcing gender equity: Ada lovelace day, and its companion website, aims to raise the profile of women in science and technology". American Scientist. 99 (6): 463. doi:10.1511/2011.93.463. ISSN0003-0996.