To cite package ‘DPQ’ in publications use:

  Maechler M (2024). _DPQ: Density, Probability, Quantile ('DPQ')
  Computations_. R package version 0.5-9-1, ,
  <https://r-forge.r-project.org/projects/specfun>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {DPQ: Density, Probability, Quantile ('DPQ') Computations},
    author = {Martin Maechler},
    year = {2024},
    note = {R package version 0.5-9-1, 
},
    url = {https://r-forge.r-project.org/projects/specfun},
  }