Aziz, Haris, and Barton E. Lee. “Proportionally Representative Participatory Budgeting With Ordinal Preferences”. Proceedings of the AAAI Conference on Artificial Intelligence 35, no. 6 (May 18, 2021): 5110-5118. Accessed April 20, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/16646.