@misc{indiciaeeac35c27e6ac,
  title = {The apud system--an update.},
  author = {R Whitehead},
  year = {1980},
  doi = {10.3109/00313028009077093},
  url = {https://pubmed.ncbi.nlm.nih.gov/6107890/},
  note = {Source identifier: 6107890}
}