@misc{indiciae9a7183bcc57f,
  title = {Solving the Linear Balance Equation on the Globe as a Generalized Inverse Problem},
  author = {Lu, Huei-Iin and Robertson, Franklin R.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/19990115866},
  note = {Source identifier: 19990115866}
}