@misc{indiciae79b524ea5dcf,
  title = {[Enzyme immunoassay--principles and use].},
  author = {K Helgert and A Jokisch and T Beyrich},
  year = {1989},
  url = {https://pubmed.ncbi.nlm.nih.gov/2694189/},
  note = {Source identifier: 2694189}
}