Xin Xu 0007, Lei Liu, Bo Li. A survey of CAPTCHA technologies to distinguish between human and computer. Neurocomputing, 408:292-307, 2020. [doi]
@article{XuLL20-3,
title = {A survey of CAPTCHA technologies to distinguish between human and computer},
author = {Xin Xu 0007 and Lei Liu and Bo Li},
year = {2020},
doi = {10.1016/j.neucom.2019.08.109},
url = {https://doi.org/10.1016/j.neucom.2019.08.109},
researchr = {https://researchr.org/publication/XuLL20-3},
cites = {0},
citedby = {0},
journal = {Neurocomputing},
volume = {408},
pages = {292-307},
}