@article{d'alba_kieffer_shawkey_2012, 
  title={Relative contributions of pigments and biophotonic nanostructures to natural color production: a case study in budgerigar (Melopsittacus undulatus) feathers}, 
  volume={215}, 
  DOI={10.1242/jeb.064907}, 
  publisher={The Company of Biologists}, 
  author={D'Alba and Kieffer and Shawkey}, 
  year={2012}, 
  month={Mar}
  }