@misc{misc, title  = {{Observation of an excess of di-charmonium events in the four-muon final
  state with the ATLAS detector}},

 url = {{http://dx.doi.org/10.1103/PhysRevLett.131.151902 }},

 year = {{2023}},

 month = {{4}},

 author = {{Collaboration ATLAS}},

 note = {{Accessed on 2025/11/20}}}