Luo, B., Zhu, J., Yang, T., Zhao, S., Hu, C., Zhao, X. and Gao, Y. 2023. Learning Deep Hierarchical Features with Spatial Regularization for One-Class Facial Expression Recognition. Proceedings of the AAAI Conference on Artificial Intelligence. 37, 5 (Jun. 2023), 6065-6073. DOI:https://doi.org/10.1609/aaai.v37i5.25749.