To cite package ‘nlgm’ in publications use:

Tsagris M, Pandis N (2022). nlgm: Non Linear Growth Models. R package version 1.0, https://CRAN.R-project.org/package=nlgm.

Corresponding BibTeX entry:

  @Manual{,
    title = {nlgm: Non Linear Growth Models},
    author = {Michail Tsagris and Nikolaos Pandis},
    year = {2022},
    note = {R package version 1.0},
    url = {https://CRAN.R-project.org/package=nlgm},
  }