To cite package ‘qap’ in publications use:

  Hahsler M (2024). _qap: Heuristics for the Quadratic Assignment
  Problem (QAP)_. R package version 0.1-2.1,
  <https://github.com/mhahsler/qap>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {qap: Heuristics for the Quadratic Assignment Problem (QAP)},
    author = {Michael Hahsler},
    year = {2024},
    note = {R package version 0.1-2.1},
    url = {https://github.com/mhahsler/qap},
  }