@misc{indiciae40556c47121c,
  title = {[Primary benign retroperitoneal tumors].},
  author = {Kh Kumanov and S Sivchev and S Chakurov and Ts Ivanova and I Ormanov},
  year = {1977},
  url = {https://pubmed.ncbi.nlm.nih.gov/592634/},
  note = {Source identifier: 592634}
}