@misc{indiciaeafa46235d935,
  title = {[Changes in electrocardiography in chronic obstructive bronchitis].},
  author = {H Illig and G Fruhmann and W Günthner and R Thurmayr},
  year = {1968},
  url = {https://pubmed.ncbi.nlm.nih.gov/5714416/},
  note = {Source identifier: 5714416}
}