To cite package ‘mapSpainHist’ in publications use:

  Vall Prat, P. (2026). Historical municipal boundaries of Spain,
  1900-2001 [Data set]. Zenodo. https://doi.org/10.5281/zenodo.23663208

A BibTeX entry for LaTeX users is

  @Misc{,
    title = {Historical municipal boundaries of Spain, 1900-2001},
    author = {Pau {Vall Prat}},
    year = {2026},
    publisher = {Zenodo},
    doi = {10.5281/zenodo.23663208},
    note = {Data set. R package mapSpainHist: https://github.com/pauvallprat/mapSpainHist},
  }