@article{sjstrand2006,
  title={PYTHIA 6.4 physics and manual},
  author={Torbjörn Sjöstrand and S. Mrenna and Peter Skands},
  year={2006},
  journal={Journal of High Energy Physics},
  doi={10.1088/1126-6708/2006/05/026},
  url={https://doi.org/10.1088/1126-6708/2006/05/026}
}