When using spd in publications, please cite:

To cite the spd package, please use:

Alexios Ghalanos (2013). spd: Semi-Parametric Distribution. R package version 1.9.

Corresponding BibTeX entry:

  @Manual{,
    title = {spd: Semi-Parametric Distribution.},
    author = {Alexios Ghalanos},
    year = {2013},
    note = {R package version 1.9.},
  }