To cite package ‘xopen’ in publications use:

  Csárdi G, Boudra F, Dieter R, Krammer K, White J (2024). _xopen: Open
  System Files, 'URLs', Anything_. R package version 1.0.1.9000, ,
  <https://github.com/r-lib/xopen>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {xopen: Open System Files, 'URLs', Anything},
    author = {Gábor Csárdi and Fathi Boudra and Rex Dieter and Kevin Krammer and Jeremy White},
    year = {2024},
    note = {R package version 1.0.1.9000, 
},
    url = {https://github.com/r-lib/xopen},
  }