@article{Puente-Ajovín:108296,
      author        = "Puente-Ajovín, M. and Ramos, A. and Sanz-Gracia, F. and
                       Arribas-Bel, D.",
      title         = "{How sensitive is city size distribution to the definition
                       of city? The case of Spain}",
      year          = "2020",
}