To cite IDF in publications, please use:

  Ulrich, J.; Jurado, O.E.; Peter, M.; Scheibel, M.; Rust, H.W.
  Estimating IDF Curves Consistently over Durations with Spatial
  Covariates. Water 2020, 12, 3119. https://doi.org/10.3390/w12113119

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Jana Ulrich and Oscar E. Jurado and Madlen Peter and Marc Scheibel and Henning W. Rust},
    title = {Estimating IDF Curves Consistently over Durations with Spatial Covariates},
    journal = {Water},
    volume = {12},
    year = {2020},
    number = {11:3119},
    url = {https://www.mdpi.com/2073-4441/12/11/3119},
    issn = {2073-4441},
    doi = {10.3390/w12113119},
  }

See also citation('IDF') for citing this package.