To cite package ‘srppphist’ in publications use:

Ranke J (2026). srppphist: Historical Data from the Swiss Register of Plant Protection Products as an R Package. R package version 2.0.3, https://github.com/agroscope-ch/srppphist.

Corresponding BibTeX entry:

  @Manual{,
    title = {srppphist: Historical Data from the Swiss Register of
      Plant Protection Products as an R Package},
    author = {Johannes Ranke},
    year = {2026},
    note = {R package version 2.0.3},
    url = {https://github.com/agroscope-ch/srppphist},
  }