@misc{indiciae2acbfa592169,
  title = {Modes of variability in a low-order two-level model},
  author = {O'Brien, Enda and Branscome, Lee E.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19890032042},
  note = {Source identifier: 19890032042}
}