To cite package ‘PSRICalc’ in publications use:

  Feiss R (2025). _PSRICalc: Plant Stress Response Index Calculator_. R
  package version 1.0.0, <https://github.com/rfeissiv/psricalc>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {PSRICalc: Plant Stress Response Index Calculator},
    author = {Richard Feiss},
    year = {2025},
    note = {R package version 1.0.0},
    url = {https://github.com/rfeissiv/psricalc},
  }