@misc{indiciae7eccf3f82881,
  title = {Retroperitoneal extraskeletal osteosarcoma.},
  author = {F J Wesseling and R T Tjon A Tham and W Breed and P J Klinkhamer},
  year = {1990},
  doi = {10.2214/ajr.155.5.2120957},
  url = {https://pubmed.ncbi.nlm.nih.gov/2120957/},
  note = {Source identifier: 2120957}
}