@misc{indiciaefee50e61494b,
  title = {[A1 and A2 blood group substances: are there structural differences?].},
  author = {R Hauser and G Fechner and B Brinkmann},
  year = {1990},
  doi = {10.1007/bf01261423},
  url = {https://pubmed.ncbi.nlm.nih.gov/2264401/},
  note = {Source identifier: 2264401}
}