@misc{indiciaed849983eb064,
  title = {Ring sterilisation in men.},
  author = {R L Vereecken and F A Van Assche and P Nijs},
  year = {1976},
  doi = {10.1016/s0140-6736(76)91941-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/63867/},
  note = {Source identifier: 63867}
}