To cite surface use:

Ingram, Mahler T&, D.L. (2013). “SURFACE: detecting convergent evolution from comparative data by fitting Ornstein-Uhlenbeck models with stepwise AIC. Methods in Ecology and Evolution 4: 416-425. .” Methods in Ecology and Evolution, 4, 416-425.

Corresponding BibTeX entry:

  @Article{,
    title = {SURFACE: detecting convergent evolution from comparative
      data by fitting Ornstein-Uhlenbeck models with stepwise AIC.
      Methods in Ecology and Evolution 4: 416-425. },
    author = {{Ingram} and T. & Mahler and {D.L.}},
    journal = {Methods in Ecology and Evolution},
    year = {2013},
    volume = {4},
    pages = {416-425},
  }