@misc{indiciaeea26e017903c,
  title = {[2-dimensional echocardiography].},
  author = {E Köhler and C Leuner},
  year = {1983},
  doi = {10.1055/s-2007-1013066},
  url = {https://pubmed.ncbi.nlm.nih.gov/6686893/},
  note = {Source identifier: 6686893}
}