ReCAPTCHA

Z Literatura przedmiotu
Skocz do: nawigacja, szukaj
  1. Luis von Ahn, Benjamin Maurer, Colin McMillen, David Abraham, Manuel Blum, reCAPTCHA: Human-Based Character Recognition via Web Security Measures, "Science" vol. 321, 12 Sept. 2008, http://www.google.com/recaptcha/learnmore.