@misc{indiciae654341c490e4,
  title = {New method for propagating the square root covariance matrix in triangular form},
  author = {Choe, C. Y. and Tapley, B. D.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750052170},
  note = {Source identifier: 19750052170}
}