To cite package ‘PSMatch’ in publications use:

  Gatto L, Rainer J, Gibb S (2024). _PSMatch: Handling and Managing
  Peptide Spectrum Matches_. R package version 1.7.2,
  <https://github.com/rformassspectrometry/psm>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {PSMatch: Handling and Managing Peptide Spectrum Matches},
    author = {Laurent Gatto and Johannes Rainer and Sebastian Gibb},
    year = {2024},
    note = {R package version 1.7.2},
    url = {https://github.com/rformassspectrometry/psm},
  }