On the Robustness of Code Generation Techniques: An Empirical Study on GitHub Copilot. - Mastropaolo, Antonio; Pascarella, Luca; Guglielmi, Emanuela; Ciniselli, Matteo; Scalabrino, Simone; Oliveto, Rocco; Bavota, Gabriele (ICSE: International Conference on Software Engineering, 2023)