@article{1333931,
  author = {David Penn and S Apell},
  title = {Theory of Spin Polarized Secondary Electrons in Transition Metals},
  year = {1985},
  number = {55},
  month = {1985-01-01 00:01:00},
  publisher = {Physical Review Letters},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=620253},
  language = {en},
}