@misc{indiciae08822c683708,
  title = {[Methodological problems in apex cardiography and phonocardiography].},
  author = {L Vokrouhlický and I Kosmák and P Stránský and Z Grosman and J Vácha and M Valach and O Kacer},
  year = {1977},
  url = {https://pubmed.ncbi.nlm.nih.gov/305639/},
  note = {Source identifier: 305639}
}