@misc{indiciaed47265d66186,
  title = {Tracking magma volume recovery at Okmok Volcano using GPS and an unscented kalman filter},
  author = {T. Fournier and Jeffrey T. Freymueller and Peter Cervelli},
  year = {2009},
  doi = {10.1029/2008jb005837},
  url = {https://pubs.usgs.gov/publication/70035769},
  note = {Source identifier: 70035769}
}