Zhang, Y., D. Huang, and Y. Wang. “PC-RGNN: Point Cloud Completion and Graph Neural Network for 3D Object Detection”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 35, no. 4, May 2021, pp. 3430-7, https://ojs.aaai.org/index.php/AAAI/article/view/16456.