@misc{indiciaed0291a1d6f2a,
  title = {Doubly differential positron-backscattering yields.},
  author = {GR Massoumi and N Hozhabri and WN Lennard and PJ Schultz},
  year = {1991},
  doi = {10.1103/physrevb.44.3486},
  url = {https://pubmed.ncbi.nlm.nih.gov/9999975/},
  note = {Source identifier: 9999975}
}