@misc{indiciae2f8e12ff7698,
  title = {The Apparition Problem for Equianharmonic Divisibility Sequences.},
  author = {L K Durst},
  year = {1952},
  doi = {10.1073/pnas.38.4.330},
  url = {https://pubmed.ncbi.nlm.nih.gov/16589099/},
  note = {Source identifier: 16589099}
}