To cite package ‘xpress’ in publications use:

Narasimhan B (2026). xpress: XPRESS Solver Interface Stub. R package version 9.8.0, https://github.com/bnaras/xpress.

Corresponding BibTeX entry:

  @Manual{,
    title = {xpress: XPRESS Solver Interface Stub},
    author = {Balasubramanian Narasimhan},
    year = {2026},
    note = {R package version 9.8.0},
    url = {https://github.com/bnaras/xpress},
  }