@article{simpson_2005, 
  title={IMMUNOLOGY: A Regulatory Effect of Tax}, 
  volume={308}, 
  DOI={10.1126/science.308.5726.1229b}, 
  number={5726}, 
  publisher={American Association for the Advancement of Science (AAAS)}, 
  author={Simpson}, 
  year={2005}, 
  month={May}
  }