Cho, Yoon-Sik, Greg Ver Steeg, and Aram Galstyan. “Where and Why Users ‘Check In’”. Proceedings of the AAAI Conference on Artificial Intelligence 28, no. 1 (June 19, 2014). Accessed May 10, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/8746.