@misc{indiciaeced23d21a9fe,
  title = {Metrizamide, a new density-gradient medium.},
  author = {D Rickwood and G D Birnie},
  year = {1975},
  doi = {10.1016/0014-5793(75)80467-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/1112406/},
  note = {Source identifier: 1112406}
}