author = {M. Martinez-Diaz and J. Fierrez and J. Galbally},
journal = {IEEE Trans. on Human-Machine Systems},
month = {August},
number = {4},
pages = {607-614},
title = {Graphical Password-based User Authentication with Free-Form Doodles},
volume = {46},
year = {2016},
doi = {http://dx.doi.org/10.1109/THMS.2015.2504101},