To cite the smatr package please use:

Warton DI, Duursma RA, Falster DS, Taskinen S (2012). “smatr 3 - an R package for estimation and inference about allometric lines.” Methods in Ecology and Evolution, 3, 257-259.

Corresponding BibTeX entry:

  @Article{,
    title = {smatr 3 - an R package for estimation and inference about
      allometric lines},
    author = {David I. Warton and Remko A. Duursma and Daniel S.
      Falster and Sara Taskinen},
    year = {2012},
    volume = {3},
    pages = {257-259},
    journal = {Methods in Ecology and Evolution},
  }