@misc{indiciaeddc2070a1c3f,
  title = {Subsurface Supergranular Vertical Flows as Measured Using Large Distance Separations in Time-Distance Helioseismology},
  author = {Duvall, T. L., Jr. and Hanasoge, S. M.},
  year = {2012},
  url = {https://ntrs.nasa.gov/citations/20120009700},
  note = {Source identifier: 20120009700}
}