Low-temperature behavior of potassium and sodium silicate glasses.

@article{Macdonald1985LowtemperatureBO,
  title={Low-temperature behavior of potassium and sodium silicate glasses.},
  author={B Macdonald and O Anderson and Schroeder},
  journal={Physical review. B, Condensed matter},
  year={1985},
  volume={31 2},
  pages={1090-1101}
}