To cite iNextPD in publications use:

Hsieh, T. C. and Chao, A. (2016). iNextPD: Interpolation and Extrapolation for Phylogenetic Diversity. R package version 0.3.2 URL: http://chao.stat.nthu.edu.tw/blog/software-download

Hsieh, T.C. and Chao, A. (2017). Rarefaction and extrapolation: making fair comparison of abundance-sensitive phylogenetic diversity among multiple assemblages. Systematic Biology 66 (1): 100-111.

Corresponding BibTeX entries:

  @Manual{,
    title = {iNextPD: Interpolation and Extrapolation for Phylogenetic
      Diversity},
    author = {T. C. Hsieh and Anne Chao},
    year = {2017},
    note = {R package version 0.3.2},
    url = {http://chao.stat.nthu.edu.tw/blog/software-download/},
  }

  @Article{,
    title = {Rarefaction and extrapolation: making fair comparison of
      abundance-sensitive phylogenetic diversity among multiple
      assemblages},
    author = {T. C. Hsieh and Anne Chao},
    journal = {Systematic Biology},
    year = {2017},
    doi = {10.1093/sysbio/syw073},
  }