Brau, F., G. Rossolini, A. Biondi, and G. Buttazzo. “Robust-by-Design Classification via Unitary-Gradient Neural Networks”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 37, no. 12, June 2023, pp. 14729-37, doi:10.1609/aaai.v37i12.26721.