@misc{indiciae84503de7e11d,
  title = {Plasma heparin: a unique, practical, submicrogram-sensitive assay.},
  author = {E T Yin and S Wessler and J V Butler},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4683428/},
  note = {Source identifier: 4683428}
}