References
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[2] Deng, Jiankang, Jia Guo, and Stefanos Zafeiriou. "ArcFace: Additive Angular Margin Loss for Deep Face Recognition." arXiv preprint arXiv:1801.07698 (2018).
[3] Wang, Hao, Yitong Wang, Zheng Zhou, Xing Ji, Zhifeng Li, Dihong Gong, Jingchao Zhou, and Wei Liu. "CosFace: Large Margin Cosine Loss for Deep Face Recognition." arXiv preprint arXiv:1801.09414 (2018).