@misc{indiciaefb8576463b1f,
  title = {Study on Doppler waveforms from the fetal cardiovascular system.},
  author = {J Y Choi and C I Noh and Y S Yun},
  year = {1991},
  doi = {10.1159/000263627},
  url = {https://pubmed.ncbi.nlm.nih.gov/1768349/},
  note = {Source identifier: 1768349}
}