To cite package ‘popsom7’ in publications use:

  Hamel L, Ott B, Breard G, Tatoian R, Eiger M, Gopu V (2025).
  _popsom7: A Fast, User-Friendly Implementation of Self-Organizing
  Maps (SOMs)_. R package version 7.1.0,
  <https://CRAN.R-project.org/package=popsom7>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {popsom7: A Fast, User-Friendly Implementation of Self-Organizing Maps
(SOMs)},
    author = {Lutz Hamel and Benjamin Ott and Gregory Breard and Robert Tatoian and Michael Eiger and Vishakh Gopu},
    year = {2025},
    note = {R package version 7.1.0},
    url = {https://CRAN.R-project.org/package=popsom7},
  }