@misc{indiciaeb9dbf71a8f74,
  title = {Piezo-electroreflectance in Ge, GaAs, and Si.},
  author = {Cardona, M. and Pollak, F. H.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680059334},
  note = {Source identifier: 19680059334}
}