To cite package ‘minqa’ in publications use:

  Bates D, Mullen KM, Nash JC, Varadhan R (2024). _minqa:
  Derivative-Free Optimization Algorithms by Quadratic Approximation_.
  R package version 1.2.8,
  <https://r-forge.r-project.org/projects/optimizer>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {minqa: Derivative-Free Optimization Algorithms by Quadratic
Approximation},
    author = {Douglas Bates and Katharine M. Mullen and John C. Nash and Ravi Varadhan},
    year = {2024},
    note = {R package version 1.2.8},
    url = {https://r-forge.r-project.org/projects/optimizer},
  }