@misc{indiciae89235a88d862,
  title = {Fetal heart rate variation described using a probability distribution matrix.},
  author = {T Koyanagi and T Yoshizato and N Horimoto and T Takashima and S Satoh and H Maeda and H Nakano},
  year = {1994},
  doi = {10.1016/0020-7101(94)90046-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/8175206/},
  note = {Source identifier: 8175206}
}