@inproceedings{Colangelo:2023X+,
  author = "Colangelo, Gilberto  and  Hoferichter, Martin  and  Stoffer, Peter",
  title = "{Puzzles in the hadronic contributions to the muon anomalous magnetic moment}",
  doi = "10.22323/1.452.0019",
  booktitle = "Proceedings of Muon4Future Workshop {\textemdash} PoS(Muon4Future2023)",
  year = 2023,
  volume = "452",
  pages = "019"
}