@phdthesis{frey_baur_staudinger_1926, 
  title={Ueber die Konstitution der Polysaccharide}, 
  DOI={10.3929/ethz-a-000092401}, 
  school={ETH Zurich}, 
  author={Frey, Karl and Baur, Emil and Staudinger, Hermann}, 
  year={1926}
  }