Yang, E., C. Deng, W. Liu, X. Liu, D. Tao, and X. Gao. “Pairwise Relationship Guided Deep Hashing for Cross-Modal Retrieval”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 31, no. 1, Feb. 2017, doi:10.1609/aaai.v31i1.10719.