Li, P., B. Wang, and L. Zhang. “Adversarial Pose Regression Network for Pose-Invariant Face Recognitions”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 35, no. 3, May 2021, pp. 1940-8, https://ojs.aaai.org/index.php/AAAI/article/view/16289.