@article{sun_you_2004, 
  title={2-Ammonio-3-phenylpropanoic acid–monohydrogen sulfate–2-ammonio-3-phenylpropanoate (1/1/1)}, 
  volume={60}, 
  DOI={10.1107/s1600536804018434}, 
  publisher={International Union of Crystallography (IUCr)}, 
  author={Sun and You}, 
  year={2004}, 
  month={Jul}
  }