To cite package ‘modopt.matlab’ in publications use:

  Hochreiter R (2023). _modopt.matlab: 'MatLab'-Style Modeling of
  Optimization Problems_. R package version 1.0-4,
  <https://github.com/rhochreiter/modopt.matlab>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {modopt.matlab: 'MatLab'-Style Modeling of Optimization Problems},
    author = {Ronald Hochreiter},
    year = {2023},
    note = {R package version 1.0-4},
    url = {https://github.com/rhochreiter/modopt.matlab},
  }