Kantharaju, P., K. Alderfer, J. Zhu, B. Char, B. Smith, and S. Ontanon. “Tracing Player Knowledge in a Parallel Programming Educational Game”. Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment, vol. 14, no. 1, Sept. 2018, pp. 173-9, doi:10.1609/aiide.v14i1.13038.