To cite the nested sampling method, please use:

  Skilling J (2004). “Nested Sampling.” _AIP Conference Proceedings_,
  *735*(1), 395–405. doi:10.1063/1.1835238
  <https://doi.org/10.1063/1.1835238>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Nested Sampling},
    author = {John Skilling},
    journal = {AIP Conference Proceedings},
    year = {2004},
    volume = {735},
    number = {1},
    pages = {395–405},
    doi = {10.1063/1.1835238},
  }

  Skilling J (2006). “Nested Sampling for General Bayesian
  Computation.” _Bayesian Analysis_, *1*(4), 833–859.
  doi:10.1214/06-BA127 <https://doi.org/10.1214/06-BA127>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Nested Sampling for General Bayesian Computation},
    author = {John Skilling},
    journal = {Bayesian Analysis},
    year = {2006},
    volume = {1},
    number = {4},
    pages = {833–859},
    doi = {10.1214/06-BA127},
  }