D. Scobee, and S. Sastry. (2019)cite arxiv:1909.05477Comment: Published as a conference paper at the International Conference on Learning Representations (ICLR), 2020 (at https://openreview.net/forum?id=BJliakStvH ).
R. Kumar, A. Tomkins, S. Vassilvitskii, and E. Vee. Proceedings of the Eighth ACM International Conference on Web Search and Data Mining, page 359--368. ACM, (2015)