CAPTCHA
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(New page: == References == {{Reflist}} <ref>{{cite journal | author = Luis von Ahn, Ben Maurer, Colin McMillen, David Abraham and Manuel Blum | date= 2008 | url = http://www.cs.cmu.edu/~biglou/reC...) |
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+ | <ref>{{cite journal | author = Luis von Ahn, Ben Maurer, Colin McMillen, David Abraham and Manuel Blum | date= 2008 | url = http://www.cs.cmu.edu/~biglou/reCAPTCHA_Science.pdf| format = PDF | title = reCAPTCHA: Human-Based Character Recognition via Web Security Measures| journal=Science | volume=321 | pages=1465–1468}}</ref> | ||
== References == | == References == | ||
{{Reflist}} | {{Reflist}} | ||
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Revision as of 13:36, 6 April 2009
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