@misc{indiciae61cf5a8af6bc,
  title = {Polymorphism of urinary 4-hydroxyproline-containing polypeptides.},
  author = {A Szymanowicz},
  year = {1981},
  doi = {10.1016/s0378-4347(00)80243-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/7298759/},
  note = {Source identifier: 7298759}
}