To cite eixport in publications use at least the first, if not both:

Ibarra-Espinosa S, Schuch D, Dias de Freitas E (2018). “eixport: An R package to export emissions to atmospheric models.” The Journal of Open Source Software. doi: 10.21105/joss.00607, http://joss.theoj.org/papers/10.21105/joss.00607.

Ibarra-Espinosa S (2019). eixport: Export Emissions to Atmospheric Models. R package version 0.4.0, https://CRAN.R-project.org/package=eixport.

Thanks

Corresponding BibTeX entries:

  @Article{,
    title = {eixport: An R package to export emissions to atmospheric
      models},
    journal = {The Journal of Open Source Software},
    author = {Sergio Ibarra-Espinosa and Daniel Schuch and Edmilson
      {Dias de Freitas}},
    year = {2018},
    doi = {10.21105/joss.00607},
    url = {http://joss.theoj.org/papers/10.21105/joss.00607},
  }
  @Manual{,
    title = {eixport: Export Emissions to Atmospheric Models},
    author = {Sergio Ibarra-Espinosa},
    year = {2019},
    note = {R package version 0.4.0},
    url = {https://CRAN.R-project.org/package=eixport},
  }