@misc{indiciaeb749608a0936,
  title = {The fourth barrier.},
  author = {E O Schraa and R L Marquet and J N IJzermans},
  year = {1999},
  doi = {10.1185/03007999909116505},
  url = {https://pubmed.ncbi.nlm.nih.gov/10640267/},
  note = {Source identifier: 10640267}
}