Yang, Xinghao, Weifeng Liu, James Bailey, Dacheng Tao, and Wei Liu. “Bigram and Unigram Based Text Attack via Adaptive Monotonic Heuristic Search”. Proceedings of the AAAI Conference on Artificial Intelligence 35, no. 1 (May 18, 2021): 706-714. Accessed April 24, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/16151.