@misc{indiciae8f2399191d83,
  title = {Landward and eastward shift of Alaskan polar bear denning associated with recent sea ice changes},
  author = {Anthony S. Fischbach and Steven C. Amstrup and David C. Douglas},
  year = {2007},
  doi = {10.1007/s00300-007-0300-4},
  url = {https://pubs.usgs.gov/publication/70031382},
  note = {Source identifier: 70031382}
}