To cite hydroGOF in publications use:

  Zambrano-Bigiarini, M. (2024) hydroGOF: Goodness-of-fit functions for
  comparison of simulated and observed hydrological time seriesR
  package version 0.6-0. URL
  https://cran.r-project.org/package=hydroGOF.
  doi:10.5281/zenodo.839854.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{hydroGOF}: Goodness-of-fit functions for comparison of simulated and observed hydrological time series},
    author = {{Zambrano-Bigiarini, Mauricio}},
    year = {2024},
    note = {R package version 0.6-0 . doi:10.5281/zenodo.839854},
    url = {https://cran.r-project.org/package=hydroGOF},
    doi = {10.5281/zenodo.839854},
  }

I have invested an important amount of time and effort in creating
hydroGOF, please cite it if you use it !