Boopathy, A., L. Weng, S. Liu, P.-Y. Chen, G. Zhang, and L. Daniel. “Fast Training of Provably Robust Neural Networks by SingleProp”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 35, no. 8, May 2021, pp. 6803-11, https://ojs.aaai.org/index.php/AAAI/article/view/16840.