@misc{indiciaece81232c6ded,
  title = {Suprathermal proton X-ray bremsstrahlung},
  author = {Boldt, E. and Serlemitsos, P.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680028384},
  note = {Source identifier: 19680028384}
}