@article{puska_nieminen_1992, 
  title={Positron and electron energy levels in rare-gas solids}, 
  volume={46}, 
  DOI={10.1103/physrevb.46.1278}, 
  publisher={American Physical Society (APS)}, 
  author={Puska and Nieminen}, 
  year={1992}, 
  month={Jul}
  }