Learning Binary Codes for Collaborative Filtering Zhou K, Zha H. Learning binary codes for collaborative filtering[C]. knowledge discovery and data mining, 2012: 498-506.

H. Zhang, F. Shen, W. Liu, X. He, H. Luan, and T. S. Chua, “Discrete collaborative filtering,” in SIGIR, 2016, pp. 325–334.

Y. Zhang, D. Lian, and G. Yang, “Discrete personalized ranking for fast collaborative filtering from implicit feedback,” in AAAI, 2017, pp. 1669–1675.

Z. Zhang, Q. Wang, L. Ruan, and L. Si. Preference preserving hashing for efficient recommendation. In SIGIR, 2014.