@misc{indiciae51945f4151d3,
  title = {Problems on periodic simple continued fractions.},
  author = {P Chowla and S Chowla},
  year = {1972},
  doi = {10.1073/pnas.69.12.3745},
  url = {https://pubmed.ncbi.nlm.nih.gov/16592042/},
  note = {Source identifier: 16592042}
}