@misc{indiciaef5ff47ca1620,
  title = {Persistent fertility after vasectomy.},
  author = {A Halim and J Blandy},
  year = {1973},
  doi = {10.1136/bmj.3.5871.110-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/4717838/},
  note = {Source identifier: 4717838}
}