Liu, Pengfei, Jie Fu, Yue Dong, Xipeng Qiu, and Jackie Chi Kit Cheung. “Learning Multi-Task Communication With Message Passing for Sequence Learning”. Proceedings of the AAAI Conference on Artificial Intelligence 33, no. 01 (July 17, 2019): 4360-4367. Accessed February 25, 2021. https://ojs.aaai.org/index.php/AAAI/article/view/4346.