@misc{indiciaefe9935190101,
  title = {Patent patterns in biotech.},
  author = {B J Spalding},
  year = {1991},
  doi = {10.1038/nbt0991-817},
  url = {https://pubmed.ncbi.nlm.nih.gov/1367353/},
  note = {Source identifier: 1367353}
}