@misc{indiciaeedd4db5e0985,
  title = {On the Eigenvalues of a Singular Nonself- Adjoint Differential Operator of Second Order},
  author = {Krall, A. M.},
  year = {1965},
  url = {https://ntrs.nasa.gov/citations/19660007803},
  note = {Source identifier: 19660007803}
}