@misc{indiciae740a4e2e89d0,
  title = {Note on the Sturm-Liouville Eigenvalue-Eigenfunction Problem with Singular End-Points.},
  author = {E C Kemble},
  year = {1933},
  doi = {10.1073/pnas.19.7.710},
  url = {https://pubmed.ncbi.nlm.nih.gov/16577552/},
  note = {Source identifier: 16577552}
}