@article{klein_1895, 
  title={THE THHEORY AND PRACTICE OF PRO TECTIVE INOCULATIONS.}, 
  volume={145}, 
  DOI={10.1016/s0140-6736(01)93092-2}, 
  number={3733}, 
  publisher={Elsevier BV}, 
  author={Klein}, 
  year={1895}
  }