@misc{indiciaef91650099363,
  title = {Block copolyurethanes in the urinary system.},
  author = {S M Bergman and D J Lyman and R G Middleton},
  year = {1977},
  url = {https://pubmed.ncbi.nlm.nih.gov/323184/},
  note = {Source identifier: 323184}
}