@book{UBHD-68617353,
  author={D{\"u}ll, Maximilian},
  title={Gravitational closure of matter field equations},
  subtitle={general theory & symmetrization},
  address={Heidelberg},
  year={2020},
  pages={1 Online-Ressource (106 Seiten)},
  language={eng},
  school={Dissertation,  Heidelberg University,  2020},
  doi={10.11588/heidok.00028630},
  url={https://nbn-resolving.org/urn:nbn:de:bsz:16-heidok-286302},
  library={UB},
}
@book{UBHD-68626751,
  author={D{\"u}ll, Maximilian},
  organization={Universit{\"a}t Heidelberg},
  title={Gravitational closure of matter field equations},
  subtitle={general theory & symmetrization},
  address={Heidelberg},
  year={2020},
  pages={103 Bl{\"a}tter},
  language={eng},
  school={Dissertation,  Heidelberg University,  2020},
  library={UB [Signatur: 2020 U 579]},
}
@article{UBHD-68401033,
  author={D{\"u}ll, Maximilian},
  title={Gravitational closure of matter field equations},
  year={2018},
  pages={23 S.},
  language={eng},
  issn={2470-0029},
  volume={97(2018},
  note={Gesehen am 25.06.2019},
  journal={Physical review},
  doi={10.1103/PhysRevD.97.084036},
}