Thippur, Akshaya, Chris Burbridge, Lars Kunze, Marina Alberti, John Folkesson, Patric Jensfelt, and Nick Hawes. “A Comparison of Qualitative and Metric Spatial Relation Models for Scene Understanding”. Proceedings of the AAAI Conference on Artificial Intelligence 29, no. 1 (February 18, 2015). Accessed May 21, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/9421.