@misc{indiciae28f0d2b42f5e,
  title = {Covariance analysis algorithm for interconnected systems},
  author = {Curley, Robert D. and Cheng, Victor H. L. and Lin, Ching-An},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910045162},
  note = {Source identifier: 19910045162}
}