@article{becker_1940, 
  title={Production of Positive Serologic Reactions in Rabbits; and the Subsequent Reactions of the Serologically Altered Animals to Inoculation with Treponema Pallida}, 
  DOI={10.1038/jid.1940.5}, 
  publisher={Elsevier BV}, 
  author={Becker}, 
  year={1940}
  }