@article{emsley2004,
  title={<i>Coot</i>: model-building tools for molecular graphics},
  author={Paul Emsley and Kevin Cowtan},
  year={2004},
  journal={Acta Crystallographica Section D Biological Crystallography},
  doi={10.1107/s0907444904019158},
  url={https://doi.org/10.1107/s0907444904019158}
}