@misc{indiciaec10de73d6d9e,
  title = {Does epidural fentanyl decrease the efficacy of epidural morphine after cesarean delivery?},
  author = {R D Vincent and D H Chestnut and W W Choi and P L Ostman and J N Bates},
  year = {1992},
  url = {https://pubmed.ncbi.nlm.nih.gov/1567032/},
  note = {Source identifier: 1567032}
}