@misc{indiciae0891fff738a1,
  title = {Lower-bound procedure for energy eigenvalues by the partitioning technique.},
  author = {Choi, J. H. and Smith, D. W.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19670038107},
  note = {Source identifier: 19670038107}
}