To cite 'pems.utils' package in publications use:

  Karl Ropkins (2022). pems.utils: Data handling, analysis and
  visualisation tools for data from portable emissions monitoring
  systems and other mobile sources. R package version 0.2.30.0.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {pems.utils: Data handling, analysis and visualisation tools for data from portable emissions monitoring systems and other mobile sources.},
    author = {Karl Ropkins},
    year = {2022},
    note = {R package version 0.2.30.0},
  }

  Karl Ropkins, Stephen Hanley and Said Munir (2012). The R package
  pems.utils: open-source processing, Visualization and Analysis Tools
  for Portable Emissions Measurement Systems data. 22nd CRC Real World
  Emissions Workshop. San Diego, US, 25-28 March, 2012.

A BibTeX entry for LaTeX users is

  @Proceedings{,
    title = {The R package pems.utils: open-source processing, Visualization and Analysis Tools for Portable Emissions Measurement Systems data.},
    author = {Karl Ropkins and Stephen Hanley and Said Munir},
    year = {2012},
    note = {22nd CRC Real World Emissions Workshop. San Diego, US, 25-28 March, 2012.},
  }

Please cite both 'pems.utils' and R when using 'pems.utils' for data
analysis. For R citation, see ‘citation()’