Chandak, Y., Theocharous, G., Nota, C. and Thomas, P. 2020. Lifelong Learning with a Changing Action Set. Proceedings of the AAAI Conference on Artificial Intelligence. 34, 04 (Apr. 2020), 3373-3380. DOI:https://doi.org/10.1609/aaai.v34i04.5739.