If you use tlm, please cite:

Barrera-Gomez J, Basagana X. Models with transformed variables: Interpretation and software. Epidemiology 2015;26(2):e16-17.<doi:10.1097/EDE.0000000000000247>.

Corresponding BibTeX entry:

  @Article{,
    title = {Models with transformed variables: Interpretation and
      software},
    author = {Jose Barrera-G\'omez and Xavier Basaga\~na},
    journal = {Epidemiology},
    year = {2015},
    volume = {26},
    number = {2},
    pages = {e16--17},
    doi = {10.1097/EDE.0000000000000247},
    url = {https://doi.org/10.1097/EDE.0000000000000247},
  }