@article{vachaspati_1994, 
  title={Production of vortices by scattering particles}, 
  volume={49}, 
  DOI={10.1103/physrevd.49.r4985}, 
  number={10}, 
  publisher={American Physical Society (APS)}, 
  author={Vachaspati}, 
  year={1994}, 
  month={May}
  }