@misc{indiciae62f067351eaf,
  title = {Sperm-counts after vasectomy.},
  author = {R J Evans},
  year = {1973},
  doi = {10.1016/s0140-6736(73)91441-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/4123421/},
  note = {Source identifier: 4123421}
}