Zhou, Yi, Junying Zhou, Lu Liu, Jiangtao Feng, Haoyuan Peng, and Xiaoqing Zheng. “RNN-Based Sequence-Preserved Attention for Dependency Parsing”. Proceedings of the AAAI Conference on Artificial Intelligence 32, no. 1 (April 27, 2018). Accessed October 17, 2021. https://ojs.aaai.org/index.php/AAAI/article/view/12011.