@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 = "10.22323/1.445.0042",
  booktitle = "Proceedings of 21st Conference on Flavor Physics and CP Violation {\textemdash} PoS(FPCP2023)",
  year = 2023,
  volume = "445",
  pages = "042"
}