To cite package ‘n1qn1’ in publications use:

  Fidler M, Wang W, Lemarechal C (2024). _n1qn1: Port of the 'Scilab'
  'n1qn1' Module for Unconstrained BFGS Optimization_. R package
  version 6.0.1-12, <https://github.com/nlmixr2/n1qn1c>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {n1qn1: Port of the 'Scilab' 'n1qn1' Module for Unconstrained BFGS
Optimization},
    author = {Matthew Fidler and Wenping Wang and Claude Lemarechal},
    year = {2024},
    note = {R package version 6.0.1-12},
    url = {https://github.com/nlmixr2/n1qn1c},
  }