Han, Ting, Casey Kennington, and David Schlangen. “Placing Objects in Gesture Space: Toward Incremental Interpretation of Multimodal Spatial Descriptions”. Proceedings of the AAAI Conference on Artificial Intelligence 32, no. 1 (April 27, 2018). Accessed October 17, 2021. https://ojs.aaai.org/index.php/AAAI/article/view/11974.