Brill, M., Forster, S., Lackner, M., Maly, J. and Peters, J. 2023. Proportionality in Approval-Based Participatory Budgeting. Proceedings of the AAAI Conference on Artificial Intelligence. 37, 5 (Jun. 2023), 5524-5531. DOI:https://doi.org/10.1609/aaai.v37i5.25686.