To cite package ‘FNN’ in publications use:

Beygelzimer A, Kakadet S, Langford J, Arya S, Mount D, Li S (2024). FNN: Fast Nearest Neighbor Search Algorithms and Applications. R package version 1.1.4.1, https://CRAN.R-project.org/package=FNN.

Corresponding BibTeX entry:

  @Manual{,
    title = {FNN: Fast Nearest Neighbor Search Algorithms and
      Applications},
    author = {Alina Beygelzimer and Sham Kakadet and John Langford and
      Sunil Arya and David Mount and Shengqiao Li},
    year = {2024},
    note = {R package version 1.1.4.1},
    url = {https://CRAN.R-project.org/package=FNN},
  }