@article{lense_1920, 
  title={Die Ellipsoidhypothese in den Spezialbewegungen der Fixsterne}, 
  volume={210}, 
  DOI={10.1002/asna.19202101502}, 
  number={15}, 
  publisher={Wiley}, 
  author={Lense}, 
  year={1920}
  }