@misc{indiciaef0c36c48b0e7,
  title = {An initial value method for the Ambarzumian integral equation.},
  author = {Buell, J. and Kalaba, R. and Fymat, A.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720047223},
  note = {Source identifier: 19720047223}
}