Lu, Y., X. Xu, M. Ding, Z. Lu, and T. Xiang. “A Global Occlusion-Aware Approach to Self-Supervised Monocular Visual Odometry”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 35, no. 3, May 2021, pp. 2260-8, https://ojs.aaai.org/index.php/AAAI/article/view/16325.