Sun, Y., Y. Shan, C. Tang, Y. Hu, Y. Dai, J. Yu, J. Sun, F. Huang, and L. Si. “Unsupervised Learning of Deterministic Dialogue Structure With Edge-Enhanced Graph Auto-Encoder”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 35, no. 15, May 2021, pp. 13869-77, https://ojs.aaai.org/index.php/AAAI/article/view/17634.