@book{UBHD-67320045,
  author={Schubart, Joachim},
  title={Behandlung von Ausnahmef{\"a}llen der s{\"a}kularen St{\"o}rungstheorie},
  subtitle={mit besonderer Ber{\"u}cksichtigung der kleinen Planeten der Hilda-Gruppe},
  year={1967},
  pages={60 gez. Bl.},
  language={ger},
  school={Heidelberg, Univ., Habil.schr., 1967},
  library={UB [Signatur: 67 Q 846]},
}
@book{UBHD-2122743,
  author={Schubart, Joachim and Zech, Gert},
  title={Determination of the astronomical unit by the dynamical method},
  publisher={Astronomisches Recheninstitut},
  address={Heidelberg},
  year={1967},
  pages={1 Bl.},
  language={eng},
  number={ARRAY(0x561627dc6550)},
  series={Mitteilungen / Astronomisches Recheninstitut in Heidelberg},
  note={Reprinted from Nature ; 214.1967,5091},
  library={UB [Signatur: 68 R 230]},
}
@article{UBHD-68242359,
  author={Schubart, Joachim},
  title={Libration of arguments of circumbinary-planet orbits at resonance},
  year={2017},
  pages={295-301},
  language={eng},
  issn={1572-9478},
  volume={128},
  number={2/3},
  note={Gesehen am 12.04.2018},
  journal={Celestial mechanics and dynamical astronomy},
  doi={10.1007/s10569-017-9752-1},
}
@book{UBHD-69054896,
  author={Schubart, Joachim},
  title={Untersuchungen {\"u}ber periodische L{\"o}sungen im Dreik{\"o}rperproblem},
  year={1955},
  pages={19 S.},
  language={ger},
  school={Berlin, Univ., Diss., 1954},
}