@misc{indiciae3af2b9221951,
  title = {Discontinuous density gradient analysis of the developing human thymus.},
  author = {R Parkman and E Merler},
  year = {1973},
  doi = {10.1016/0008-8749(73)90122-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/4737693/},
  note = {Source identifier: 4737693}
}