@misc{indiciae26ed88a92e8f,
  title = {Periodic heat flow in a stratified medium with application to permafrost problems},
  author = {Arthur H. Lachenbruch},
  year = {1958},
  doi = {10.3133/ofr5857},
  url = {https://pubs.usgs.gov/publication/ofr5857},
  note = {Source identifier: ofr5857}
}