Zhou, C., J. Bai, J. Song, X. Liu, Z. Zhao, X. Chen, and J. Gao. “ATRank: An Attention-Based User Behavior Modeling Framework for Recommendation”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 32, no. 1, Apr. 2018, doi:10.1609/aaai.v32i1.11618.