Hogg, Tad, and Kristina Lerman. “Stochastic Models of User-Contributory Web Sites”. Proceedings of the International AAAI Conference on Web and Social Media 3, no. 1 (March 19, 2009): 50-57. Accessed April 25, 2024. https://ojs.aaai.org/index.php/ICWSM/article/view/13939.