@misc{indiciae78e5b3274cf1,
  title = {Exploring extensions to multi-state models with multiple unobservable states},
  author = {L.L. Bailey and W. L. Kendall and D.R. Church},
  year = {2009},
  url = {https://pubs.usgs.gov/publication/5211456},
  note = {Source identifier: 5211456}
}