To cite package ‘nlmrt’ in publications use:

Nash JC (2016). nlmrt: Functions for Nonlinear Least Squares Solutions. R package version 2016.3.2, https://CRAN.R-project.org/package=nlmrt.

Corresponding BibTeX entry:

  @Manual{,
    title = {nlmrt: Functions for Nonlinear Least Squares Solutions},
    author = {John C. Nash},
    year = {2016},
    note = {R package version 2016.3.2},
    url = {https://CRAN.R-project.org/package=nlmrt},
  }