Song, Meesun, Wonkyu Lee, and Junghwan Kim. “Extraction and Visualization of Implicit Social Relations on Social Networking Services”. Proceedings of the AAAI Conference on Artificial Intelligence 24, no. 1 (July 5, 2010): 1425–1430. Accessed May 21, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/7513.