Ahmad, M., D. Huffakar, J. Wang, J. Treem, M. Poole, and J. Srivastava. “GTPA: A Generative Model For Online Mentor-Apprentice Networks”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 24, no. 1, July 2010, pp. 1294-9, doi:10.1609/aaai.v24i1.7506.