To cite sars in a publication:

Matthews T, Triantis K, Whittaker R, Guilhaumon F (2019). “sars: an R package for fitting, evaluating and comparing species–area relationship models.” Ecography, In Press, In Press.

Corresponding BibTeX entry:

  @Article{,
    title = {sars: an R package for fitting, evaluating and comparing
      species–area relationship models},
    author = {T.J. Matthews and K. Triantis and R.J. Whittaker and F.
      Guilhaumon},
    journal = {Ecography},
    volume = {In Press},
    pages = {In Press},
    year = {2019},
  }