To cite package ‘plugdensity’ in publications use:

  Herrmann E, Maechler M (2024). _plugdensity: Plug-in Kernel Density
  Estimation_. R package version 0.8-6, ,
  <https://r-forge.r-project.org/projects/curves-etc>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {plugdensity: Plug-in Kernel Density Estimation},
    author = {Eva Herrmann and Martin Maechler},
    year = {2024},
    note = {R package version 0.8-6, 
},
    url = {https://r-forge.r-project.org/projects/curves-etc},
  }