If you use tlm, please cite:

Barrera-Gómez J, Basagaña X (2015). “Models with transformed variables: Interpretation and software.” Epidemiology, 26(2), e16–17. doi:10.1097/EDE.0000000000000247, https://doi.org/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},
  }