@misc{indiciae893b3b8ca3c2,
  title = {Solvable Hill-Harper equations.},
  author = {V Urumov},
  year = {1988},
  doi = {10.1103/physreva.38.4863},
  url = {https://pubmed.ncbi.nlm.nih.gov/9900954/},
  note = {Source identifier: 9900954}
}