Yang, X., Liu, W., Bailey, J., Tao, D. and Liu, W. 2021. Bigram and Unigram Based Text Attack via Adaptive Monotonic Heuristic Search. Proceedings of the AAAI Conference on Artificial Intelligence. 35, 1 (May 2021), 706-714. DOI:https://doi.org/10.1609/aaai.v35i1.16151.