To cite ccaPP in publications use:

  Alfons A, Croux C, Filzmoser P (2016). “Robust maximum association
  between data sets: The R package ccaPP.” _Austrian Journal of
  Statistics_, *45*(1), 71-79. doi:10.17713/ajs.v45i1.90
  <https://doi.org/10.17713/ajs.v45i1.90>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Robust maximum association between data sets: The {R} package {ccaPP}},
    author = {Andreas Alfons and Christophe Croux and Peter Filzmoser},
    journal = {Austrian Journal of Statistics},
    year = {2016},
    volume = {45},
    number = {1},
    pages = {71--79},
    doi = {10.17713/ajs.v45i1.90},
  }

To cite the underlying methodology use:

  Alfons A, Croux C, Filzmoser P (2017). “Robust maximum association
  estimators.” _Journal of the American Statistical Association_,
  *112*(517), 436-445. doi:10.1080/01621459.2016.1148609
  <https://doi.org/10.1080/01621459.2016.1148609>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Robust maximum association estimators},
    author = {Andreas Alfons and Christophe Croux and Peter Filzmoser},
    journal = {Journal of the American Statistical Association},
    year = {2017},
    volume = {112},
    number = {517},
    pages = {436--445},
    doi = {10.1080/01621459.2016.1148609},
  }