@misc{indiciaeb68942733bd2,
  title = {[A modified activator and its use].},
  author = {K Metzelder},
  year = {1968},
  doi = {10.1007/bf02166258},
  url = {https://pubmed.ncbi.nlm.nih.gov/5244021/},
  note = {Source identifier: 5244021}
}