@misc{indiciae405e7d00bc6f,
  title = {[Studies on the problem "Sid" and "Cad"].},
  author = {O Prokop and N Nenkov and A Rackwitz},
  year = {1974},
  url = {https://pubmed.ncbi.nlm.nih.gov/4549534/},
  note = {Source identifier: 4549534}
}