To cite dng in publications use:

  Li, F. and Zeng, J. (2023). {dng}: Distribution and Gradient
  Functions for split-t and split normal densities. R package version
  1.0.0 URL https://CRAN.R-project.org/package=dng

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{dng}: Distribution and Gradient Functions for the Split-t and Split Normal Densities},
    author = {Feng Li and Jiayue Zeng},
    year = {2023},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=dng},
  }

  Feng Li, Mattias Villani and Robert Kohn (2010). Flexible modeling of
  conditional distributions using smooth mixtures of asymmetric student
  t densities. Journal of Statistical Planning and Inference. Vol.
  140(12), pp. 3638-3654.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Flexible modeling of conditional distributions using smooth mixtures of asymmetric student t densities},
    author = {Feng Li and Mattias Villani and Robert Kohn},
    journal = {Journal of Statistical Planning and Inference},
    year = {2010},
    volume = {140},
    number = {12},
    pages = {3638--3654},
    doi = {10.1016/j.jspi.2010.04.031},
  }