Please cite Compind package as:

  Fusco E., Vidoli F., Sahoo B.K. (2018) Spatial heterogeneity in
  composite indicator: a methodological proposal Omega Vol. 77, pp.
  1-14

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Spatial heterogeneity in composite indicator: a methodological proposal},
    author = {Elisa Fusco and Francesco Vidoli and Biresh K. Sahoo},
    journal = {Omega},
    year = {2018},
    volume = {77},
    pages = {1--14},
  }