@article{Hartmann1998,
  author    = {Hartmann, J{\"u}rgen},
  title     = {Condensed matter: structural, mechanical, and thermal properties},
  journal   = {Applied Physics Letters},
  volume    = {73},
  number    = {6},
  pages     = {756 -- 758},
  year      = {1998},
  language  = {en}
}