@misc{indiciae8ff74ce96ef5,
  title = {Direct mechanical heart massage.},
  author = {T A Popov and V N Zhigalkin and R A Kurkaev and O B Baiseitov and Y A Medvedev and R A Timukhina},
  year = {1974},
  doi = {10.1007/bf00562091},
  url = {https://pubmed.ncbi.nlm.nih.gov/4412835/},
  note = {Source identifier: 4412835}
}