To cite package 'phylolm' in publications use:

Ho, L. S. T. and Ane, C. (2014) A linear-time algorithm for Gaussian and non-Gaussian trait evolution models Systematic Biology, 63(3):397-408.

Corresponding BibTeX entry:

  @Article{,
    author = {Lam Si Tung Ho and Cecile Ane},
    title = {A linear-time algorithm for Gaussian and non-Gaussian
      trait evolution models},
    year = {2014},
    journal = {Systematic Biology},
    volume = {63},
    pages = {397-408},
  }