To cite package ‘APTIcalc’ in publications use:

Paul N, Singh R, Chavan S, Ponnaganti N, Reddy K (2025). APTIcalc: Air Pollution Tolerance Index (APTI) Calculator. R package version 0.1.1, https://CRAN.R-project.org/package=APTIcalc.

Corresponding BibTeX entry:

  @Manual{,
    title = {APTIcalc: Air Pollution Tolerance Index (APTI)
      Calculator},
    author = {Nobin Chandra Paul and Rupali Singh and Sangram B Chavan
      and Navyasree Ponnaganti and K. Sammi Reddy},
    year = {2025},
    note = {R package version 0.1.1},
    url = {https://CRAN.R-project.org/package=APTIcalc},
  }