@article{zhang2021high, title={High-order nonlocal Hashing for unsupervised cross-modal retrieval}, author={Zhang, Peng-Fei and Luo, Yadan and Huang, Zi and Xu, Xin-Shun and Song, Jingkuan}, journal={World Wide Web}, volume={24}, number={2}, pages={563--583}, year={2021}, publisher={Springer} }