@misc{indiciae9c1c166f77d6,
  title = {Two dimensional ultrasonography during spinal surgery.},
  author = {I Sulla and M Santa and J Fagul'a},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/2092551/},
  note = {Source identifier: 2092551}
}