@article{CSIS_2021_18_3_a4,
     author = {Rafael Glikis and Christos Makris and Nikos Tsirakis},
     title = {DrCaptcha: {An} {Interactive} {Machine} {Learning} {Application}},
     journal = {Computer Science and Information Systems},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {2021},
     url = {http://geodesic.mathdoc.fr/item/CSIS_2021_18_3_a4/}
}