@misc{indiciae3710d7e2b11f,
  title = {Inversion of Gravity Fields From the Spacecraft Orbital Data Using an Adjoint Operator Approach},
  author = {Ustinov, E. A.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20000074653},
  note = {Source identifier: 20000074653}
}