To cite surface please use:

Ingram T, Mahler D (2013). “SURFACE: detecting convergent evolution from comparative data by fitting Ornstein-Uhlenbeck models with stepwise AIC.” Methods in Ecology and Evolution, 4, 416-425. doi:10.1111/2041-210X.12034.

Corresponding BibTeX entry:

  @Article{,
    title = {SURFACE: detecting convergent evolution from comparative
      data by fitting Ornstein-Uhlenbeck models with stepwise AIC.},
    author = {T. Ingram and D. L. Mahler},
    journal = {Methods in Ecology and Evolution},
    year = {2013},
    volume = {4},
    pages = {416-425},
    doi = {10.1111/2041-210X.12034},
  }