To cite airGR in publications use these two references:

Coron, L., Thirel, G., Delaigue, O., Perrin, C. and Andréassian, V. (2017). The Suite of Lumped GR Hydrological Models in an R package. Environmental Modelling and Software, 94, 166-171.<doi:10.1016/j.envsoft.2017.05.002>.

Coron, L., Perrin, C., Delaigue, O., Thirel, G. and Michel, C. (2018). airGR: Suite of GR Hydrological Models for Precipitation-Runoff Modelling. R package version 1.0.15.2. URL: https://webgr.irstea.fr/en/airGR/.

Corresponding BibTeX entries:

  @Article{,
    title = {The Suite of Lumped {GR} Hydrological Models in an {R}
      package},
    author = {L. Coron and G. Thirel and O. Delaigue and C. Perrin and
      V. Andréassian},
    journal = {Environmental Modelling and Software},
    year = {2017},
    pages = {166-171},
    volume = {94},
    doi = {10.1016/j.envsoft.2017.05.002},
  }
  @Manual{,
    title = {{airGR}: Suite of {GR} Hydrological Models for
      Precipitation-Runoff Modelling},
    author = {L. Coron and C. Perrin and O. Delaigue and G. Thirel and
      C. Michel},
    journal = {R News},
    year = {2018},
    note = {R package version 1.0.15.2},
    url = {https://webgr.irstea.fr/en/airGR/},
  }