How Good Are Humans at Solving CAPTCHAs? A Large Scale Evaluation. - Elie Bursztein; Steven Bethard; Celine Fabry; John C. Mitchell; Daniel Jurafsky (IEEE Symposium on Security and Privacy, 2010)

Webseclab Security Education Workbench. - Elie Bursztein; Baptiste Gourdin; Celine Fabry; Jason Bau; Gustav Rydstedt; Hristo Bojinov; Dan Boneh; John C. Mitchell (CSET, 2010)

The Failure of Noise-Based Non-continuous Audio Captchas. - Elie Bursztein; Romain Beauxis; Hristo S. Paskov; Daniele Perito; Celine Fabry; John C. Mitchell (IEEE Symposium on Security and Privacy, 2011)

Easy does it: more usable CAPTCHAs. - Elie Bursztein; Angelique Moscicki; Celine Fabry; Steven Bethard; John C. Mitchell; Dan Jurafsky (CHI, 2014)