P. Pham, and J. Wang. Proceedings of the 2018 on International Conference on Multimodal Interaction - ICMI \textquotesingle18, page 63-72. ACM Press, (2018)
J. Kim, P. Guo, C. Cai, S. Li, K. Gajos, and R. Miller. Proceedings of the 27th Annual ACM Symposium on User Interface Software and Technology, page 563--572. New York, NY, USA, ACM, (2014)