# How to cite OR-Tools and its solvers

OR-Tools is a suite of Google solvers (CP-SAT, GLOP, PDLP) and a
solver-independent interface that can be used to call a multitude of open source
and commercial solvers.

## How to cite the CP-SAT solver, or the Flatzinc backend

Any publication referencing the CP-SAT solver, either directly, or through
the linear solver wrapper (with the SAT_INTEGER_PROGRAMMING tag) or the flatzinc
backend, should cite it as follows, updating the version number as appropriate:

OR-Tools CP-SAT v9.12. Laurent Perron and Frédéric Didier.
https://developers.google.com/optimization/cp/cp_solver.

BibTeX:

    @software{cpsatlp,
      title = {CP-SAT},
      version = { v9.12 },
      author = {Laurent Perron and Frédéric Didier},
      organization = {Google},
      url = {https://developers.google.com/optimization/cp/cp_solver/},
      date = { 2025-02-17 }
    }

The following video of the CPAIOR 2020 masterclass on Constraint Programming
can also be used as a reference:

BibTeX:

    @misc{cpsatlp_cpaior_masterclass,
      title={CPAIOR 2020 Master Class: Constraint Programming},
      url={https://youtu.be/lmy1ddn4cyw},
      journal={CPAIOR},
      author={CPAIOR},
      year={2020},
      month={Sept.},
    }

The following abstract refers to the plenary session given at the CP2023
conference in Toronto:

BibTeX:

    @InProceedings{perron_et_al:LIPIcs.CP.2023.3,
      author =  {Perron, Laurent and Didier, Fr\'{e}d\'{e}ric and Gay, Steven},
      title =   {The CP-SAT-LP Solver},
      booktitle =   {29th International Conference on Principles and Practice of Constraint Programming (CP 2023)},
      pages =   {3:1--3:2},
      series =  {Leibniz International Proceedings in Informatics (LIPIcs)},
      ISBN =    {978-3-95977-300-3},
      ISSN =    {1868-8969},
      year =    {2023},
      volume =  {280},
      editor =  {Yap, Roland H. C.},
      publisher =   {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
      address = {Dagstuhl, Germany},
      URL =     {https://drops.dagstuhl.de/opus/volltexte/2023/19040},
      URN =     {urn:nbn:de:0030-drops-190405},
      doi =     {10.4230/LIPIcs.CP.2023.3},
      annote =  {Keywords: Constraint Programming, Operations Research, Sat Solver}
    }

## How to cite the routing library

Any publication referencing the OR-Tools routing library should cite it as
follows, updating the version number as appropriate:

OR-Tools Routing Library v9.12.
Vincent Furnon and Laurent Perron.
https://developers.google.com/optimization/routing/.

BibTeX:

    @software{ortools_routing,
      title = {OR-Tools Routing Library},
      version = { v9.12 },
      author = {Vincent Furnon and Laurent Perron},
      organization = {Google},
      url = {https://developers.google.com/optimization/routing/},
      date = { 2025-02-17 }
    }

## How to cite the OR-Tools suite

Any publication referencing OR-Tools should cite it as follows, updating the
version number as appropriate:

OR-Tools v9.12. Laurent Perron and Vincent Furnon.
https://developers.google.com/optimization/.

BibTeX:

    @software{ortools,
      title = {OR-Tools},
      version = { v9.12 },
      author = {Laurent Perron and Vincent Furnon},
      organization = {Google},
      url = {https://developers.google.com/optimization/},
      date = { 2025-02-17 }
    }