@misc{indiciae1fea1d58cbf7,
  title = {Vasectomy: how much is enough?},
  author = {R I Hallan and A R May},
  year = {1988},
  doi = {10.1111/j.1464-410x.1988.tb04369.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/3191364/},
  note = {Source identifier: 3191364}
}