@misc{indiciaecf9a89ada98d,
  title = {A WKB based preconditioner for the 1D Helmholtz wave equation},
  author = {Green, David and D'azevedo, Ed and Batchelor, Donald and Caneses Marin, Juan and Barnett, Rhea and Bertelli, Nicola and Lau, Cornwall and Mu, Lin},
  year = {2020},
  doi = {10.1063/5.0018579},
  url = {https://www.osti.gov/biblio/1820707},
  note = {Source identifier: 1820707}
}