Folsom-Kovarik, J., G. Sukthankar, and S. Schatz. “Integrating Learner Help Requests Using a POMDP in an Adaptive Training System”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 26, no. 2, Oct. 2021, pp. 2287-92, doi:10.1609/aaai.v26i2.18971.