@misc{indiciae01195a1f670b,
  title = {Immunological tolerance.},
  author = {J G Howard and N A Mitchison},
  year = {1975},
  doi = {10.1159/000395256},
  url = {https://pubmed.ncbi.nlm.nih.gov/50599/},
  note = {Source identifier: 50599}
}