To cite adegraphics in publications use this reference:

Siberchicot A, Julien-Laferrière A, Dufour A, Thioulouse J, Dray S (2017). “adegraphics: An S4 Lattice-Based Package for the Representation of Multivariate Data.” The R Journal, 9(2), 198–212. https://journal.r-project.org/archive/2017/RJ-2017-042/index.html.

Thioulouse J, Dray S, Dufour A, Siberchicot A, Jombart T, Pavoine S (2018). Multivariate Analysis of Ecological Data with ade4. Springer. doi:10.1007/978-1-4939-8850-1.

Corresponding BibTeX entries:

  @Article{,
    title = {{adegraphics: An S4 Lattice-Based Package for the
      Representation of Multivariate Data}},
    author = {Aurélie Siberchicot and Alice Julien-Laferrière and
      Anne-Béatrice Dufour and Jean Thioulouse and Stéphane Dray},
    journal = {{The R Journal}},
    year = {2017},
    volume = {9},
    pages = {198--212},
    number = {2},
    url =
      {https://journal.r-project.org/archive/2017/RJ-2017-042/index.html},
  }

  @Book{,
    title = {Multivariate Analysis of Ecological Data with {ade4}},
    author = {Jean Thioulouse and Stéphane Dray and Anne-Béatrice
      Dufour and Aurélie Siberchicot and Thibaut Jombart and Sandrine
      Pavoine},
    year = {2018},
    publisher = {Springer},
    doi = {10.1007/978-1-4939-8850-1},
  }