@misc{indiciaed02700219097,
  title = {Spontaneous necrosis in osteosarcoma.},
  author = {D S Springfield and M E Schakel and S S Spanier},
  year = {1991},
  url = {https://pubmed.ncbi.nlm.nih.gov/1993380/},
  note = {Source identifier: 1993380}
}