Krylov subspace methods for the Dirac equation

@article{Beerwerth2014KrylovSM,
  title={Krylov subspace methods for the Dirac equation},
  author={Randolf Beerwerth and Heiko Bauke},
  journal={Comput. Phys. Commun.},
  year={2014},
  volume={188},
  pages={189-197}
}
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