Bredereck, R., Faliszewski, P., Kaczmarczyk, A., Knop, D., & Niedermeier, R. (2020). Parameterized Algorithms for Finding a Collective Set of Items. Proceedings of the AAAI Conference on Artificial Intelligence, 34(02), 1838-1845. https://doi.org/10.1609/aaai.v34i02.5551