To cite package 'robCompositions' in publications you might use:

Matthias Templ, Karel Hron, Peter Filzmoser (2011). robCompositions: an R-package for robust statistical analysis of compositional data. In V. Pawlowsky-Glahn and A. Buccianti, editors, Compositional Data Analysis. Theory and Applications, pp. 341-355, John Wiley & Sons, Chichester (UK) .

Corresponding BibTeX entry:

  @Book{,
    title = {rob{C}ompositions: an R-package for robust statistical
      analysis of compositional data},
    author = {Matthias Templ and Karel Hron and Peter Filzmoser},
    publisher = {{J}ohn {W}iley and {S}ons},
    isbn = {978-0-470-71135-4},
    booktitle = {{C}ompositional {D}ata {A}nalysis: {T}heory and
      {A}pplications},
    year = {2011},
    pages = {341--355},
  }