Hong Zhang, Xing-Dong Yang, Barrett Ens, Hai-Ning Liang, Pierre Boulanger and Pourang Irani. 2012. See Me, See You: A Lightweight Method for Discriminating User Touches on Tabletop Displays. In Proceedings of the 30th international conference on Human factors in computing systems (CHI 2012). Austin, Texas. ACM, 2327-2336.
Barrett Ens, David Ahlström, Andy Cockburn and Pourang Irani. 2011. Characterizing User Performance with Assisted Direct Off-Screen Pointing. In Proceedings of the 13th international conference on Human computer interaction with mobile devices and services (MobileHCI '11). Stockholm, Sweden. ACM.
Barrett Ens, Rasit Eskicioglu and Pourang Irani. 2011. Visually Augmented Interfaces for Co-located Mobile Collaboration. In Distributed User Interfaces: Designing Interfaces for the Distributed Ecosystem. Springer, 169-176.