Li, Liang, Weirui Ye, Mingsheng Long, Yateng Tang, Jin Xu, and Jianmin Wang. “Simultaneous Learning of Pivots and Representations for Cross-Domain Sentiment Classification”. Proceedings of the AAAI Conference on Artificial Intelligence 34, no. 05 (April 3, 2020): 8220-8227. Accessed May 20, 2022. https://ojs.aaai.org/index.php/AAAI/article/view/6336.