@misc{indiciae0f77ad661bf3,
  title = {Beta-endorphin in normozoospermic and pathologic human semen.},
  author = {R Singer and S Bruchis and M Barnet and M Sagiv and H Kaufman and C Servadio},
  year = {1985},
  doi = {10.1007/bf02005876},
  url = {https://pubmed.ncbi.nlm.nih.gov/3155694/},
  note = {Source identifier: 3155694}
}