@misc{indiciaeb18b14f01080,
  title = {Directed waves in random media: An analytical calculation.},
  author = {R Friedberg and YK Yu},
  year = {1994},
  doi = {10.1103/physreve.49.5755},
  url = {https://pubmed.ncbi.nlm.nih.gov/9961902/},
  note = {Source identifier: 9961902}
}