@inproceedings{ 
    author = {Elie Bursztein and Angelique Moscicki and Celine Fabry and Steven Bethard and John C. Mitchell and Dan Jurafsky},
    booktitle = {Proceedings of ACM CHI 2014},
    title = {Easy Does It: {M}ore Usable {CAPTCHAs}},
    year = {2014},
}