@article{small,
  title={Manganese in biogenic magnetite crystals from magnetotactic bacteria},
  author={Keim, Carolina N and Lins, Ulysses and Farina, Marcos},
  journal={FEMS microbiology letters},
  volume={292},
  pages={250--253},
  year={2009},
  doi={doi.org/10.1111/j.1574-6968.2009.01499.x}
}