@misc{indiciae990a0b6ce1af,
  title = {Immunisation against human tumours.},
  author = {P Wolf and N Czajkowski},
  year = {1967},
  doi = {10.1016/s0140-6736(67)90589-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/4168709/},
  note = {Source identifier: 4168709}
}