@misc{indiciaeb631fb46fc93,
  title = {Framework for biorthogonal Fourier series.},
  author = {I Herrera and D A Spence},
  year = {1981},
  doi = {10.1073/pnas.78.12.7240},
  url = {https://pubmed.ncbi.nlm.nih.gov/16593127/},
  note = {Source identifier: 16593127}
}