@inproceedings{khamis2018chi2,
 author = {Khamis, Mohamed and Baier, Anita and Henze, Niels and Alt, Florian and Bulling, Andreas},
 title = {Understanding Face and Eye Visibility in Front-Facing Cameras of Smartphones used in the Wild.}, 
 booktitle = {Proceedings of the 36th Annual ACM Conference on Human Factors in Computing Systems}, 
 series = {CHI '18}, 
 year = {2018},
 location = {Montr\&\#233;al, Qu\&\#233;bec, Canada}, 
 publisher = {ACM}, 
 numpages = {12},
 url = {https://doi.org/10.1145/3152832.3173854},
 doi = {10.1145/3152832.3173854},
 acmid = {3173854}, 
 address = {New York, NY, USA},
}