@article{rao_mukhopadhyay_1985, 
  title={Model-potential approach to metal surfaces}, 
  volume={31}, 
  DOI={10.1103/physrevb.31.867}, 
  publisher={American Physical Society (APS)}, 
  author={Rao and Mukhopadhyay}, 
  year={1985}, 
  month={Jan}
  }