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"An Image-Based CAPTCHA Using Sophisticated Mental Rotation."
Yuki Ikeya et al. (2014)
- Yuki Ikeya, Masahiro Fujita, Junya Kani, Yuta Yoneyama, Masakatsu Nishigaki:
An Image-Based CAPTCHA Using Sophisticated Mental Rotation. HCI (24) 2014: 57-68
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