@misc{indiciaecd3ca112b0cc,
  title = {Extended-average-energy method for perturbation problems.},
  author = {Benston, M. L. and Kirtman, B.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670041457},
  note = {Source identifier: 19670041457}
}