Jérémie Chalopin, Victor Chepoi, Fionn Mc Inerney, Sébastien Ratel. Non-Clashing Teaching Maps for Balls in Graphs. The Thirty Seventh Annual Conference on Learning Theory, June 30 - July 3, 2023, Edmonton, Canada (Shipra Agrawal, Aaron Roth, eds.), volume 247 of Proceedings of Machine Learning Research, pages 840–875, 2024, PMLR.