Du, Heshan, Hai Nguyen, Natasha Alechina, Brian Logan, Michael Jackson, and John Goodwin. “Using Qualitative Spatial Logic for Validating Crowd-Sourced Geospatial Data”. Proceedings of the AAAI Conference on Artificial Intelligence 29, no. 2 (January 25, 2015): 3948-3953. Accessed April 27, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/19052.