@misc{indiciaea01932c74589,
  title = {Well-posed inverse spectral problems.},
  author = {H Hochstadt},
  year = {1975},
  doi = {10.1073/pnas.72.7.2496},
  url = {https://pubmed.ncbi.nlm.nih.gov/16592259/},
  note = {Source identifier: 16592259}
}