Cheng, Minhao, Jinfeng Yi, Pin-Yu Chen, Huan Zhang, and Cho-Jui Hsieh. 2020. “Seq2Sick: Evaluating the Robustness of Sequence-to-Sequence Models With Adversarial Examples”. Proceedings of the AAAI Conference on Artificial Intelligence 34 (04):3601-8. https://doi.org/10.1609/aaai.v34i04.5767.