To cite package ‘somhca’ in publications use:

  Pastorelli G (2025). _somhca: Self-Organising Maps Coupled with
  Hierarchical Cluster Analysis_. R package version 0.1.3,
  <https://CRAN.R-project.org/package=somhca>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {somhca: Self-Organising Maps Coupled with Hierarchical Cluster Analysis},
    author = {Gianluca Pastorelli},
    year = {2025},
    note = {R package version 0.1.3},
    url = {https://CRAN.R-project.org/package=somhca},
  }