@misc{indiciae050ed0c2ce9b,
  title = {A geometricla error in some Computer Programs based on the Aki-Christofferson-Husebye (ACH) Method of Teleseismic Tomography},
  author = {B.R. Julian and J.R. Evans and M.J. Pritchard and G.R. Foulger},
  year = {2000},
  doi = {10.1785/0119990169},
  url = {https://pubs.usgs.gov/publication/70022122},
  note = {Source identifier: 70022122}
}