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  title = {Evidence for Extraterrestrial Amino-acids and Hydrocarbons in the Murchison Meteorite},
  journal = {Nature},
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  url = {https://doi.org/10.1038/228923a0}
}

@article{Callahan2011a,
  author = {Callahan and Smith and Cleaves and others},
  title = {Carbonaceous meteorites contain a wide range of extraterrestrial nucleobases},
  journal = {Proceedings of the National Academy of Sciences},
  year = {2011},
  doi = {10.1073/pnas.1106493108},
  url = {https://doi.org/10.1073/pnas.1106493108}
}

@article{Oba2022all,
  author = {Oba and Takano and Furukawa and others},
  title = {Identifying the wide diversity of extraterrestrial purine and pyrimidine nucleobases in carbonaceous meteorites},
  journal = {Nature Communications},
  year = {2022},
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  url = {https://doi.org/10.1038/s41467-022-29612-x}
}