@misc{indiciaec72a65acbf5f,
  title = {Beating the blocked balloon.},
  author = {R L Cottingham},
  year = {1987},
  doi = {10.1111/j.1365-2044.1987.tb03114.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/3497591/},
  note = {Source identifier: 3497591}
}