Chandak, Y., Theocharous, G., Metevier, B. and Thomas, P. 2020. Reinforcement Learning When All Actions Are Not Always Available. Proceedings of the AAAI Conference on Artificial Intelligence. 34, 04 (Apr. 2020), 3381-3388. DOI:https://doi.org/10.1609/aaai.v34i04.5740.