@article{roch_1866, 
  title={Ueber Theta-Functionen vielfacher Argumente.}, 
  volume={1866}, 
  DOI={10.1515/crll.1866.66.177}, 
  number={66}, 
  publisher={Walter de Gruyter GmbH}, 
  author={Roch}, 
  year={1866}
  }