Liu, J., X. Yan, X. Dai, Z. Li, J. Cheng, and M.-C. Yang. “Understanding and Improving Proximity Graph Based Maximum Inner Product Search”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 34, no. 01, Apr. 2020, pp. 139-46, doi:10.1609/aaai.v34i01.5344.