To cite package ‘nlrr’ in publications use:

Zhan Y (2015). nlrr: Non-Linear Relative Risk Estimation and Plotting. R package version 0.1, https://CRAN.R-project.org/package=nlrr.

Corresponding BibTeX entry:

  @Manual{,
    title = {nlrr: Non-Linear Relative Risk Estimation and Plotting},
    author = {Yiqiang Zhan},
    year = {2015},
    note = {R package version 0.1},
    url = {https://CRAN.R-project.org/package=nlrr},
  }