Dickerson, John P., Karthik Abinav Sankararaman, Aravind Srinivasan, and Pan Xu. 2019. “Balancing Relevance and Diversity in Online Bipartite Matching via Submodularity”. Proceedings of the AAAI Conference on Artificial Intelligence 33 (01):1877-84. https://doi.org/10.1609/aaai.v33i01.33011877.