@misc{indiciaefa9307723f2f,
  title = {Lower Bounds to Energy Eigenvalues for the Stark Effect in a Rigid Rotator},
  author = {Choi, Jong H. and Smith, Darwin W.},
  year = {1965},
  url = {https://ntrs.nasa.gov/citations/19660036878},
  note = {Source identifier: 19660036878}
}