@article{small,
  title={Amino acid racemization on Mars: implications for the preservation of biomolecules from an extinct martian biota},
  author={Bada, Jeffrey L and McDonald, Gene D},
  journal={Icarus},
  volume={114},
  pages={139--143},
  year={1995},
  doi={10.1006/icar.1995.1049}
}