Dai, Yong, Jian Liu, Xiancong Ren, and Zenglin Xu. “Adversarial Training Based Multi-Source Unsupervised Domain Adaptation for Sentiment Analysis”. Proceedings of the AAAI Conference on Artificial Intelligence 34, no. 05 (April 3, 2020): 7618-7625. Accessed April 10, 2021. https://ojs.aaai.org/index.php/AAAI/article/view/6262.