@misc{indiciae2385e19f3067,
  title = {Nonlinear envelope-function equation and strongly localized vibrational modes in anharmonic lattices.},
  author = {YA Kosevich},
  year = {1993},
  doi = {10.1103/physrevb.47.3138},
  url = {https://pubmed.ncbi.nlm.nih.gov/10006396/},
  note = {Source identifier: 10006396}
}