@misc{indiciaeed523474ba5b,
  title = {Fetal ECG extraction with nonlinear state-space projections.},
  author = {M Richter and T Schreiber and D T Kaplan},
  year = {1998},
  doi = {10.1109/10.650369},
  url = {https://pubmed.ncbi.nlm.nih.gov/9444850/},
  note = {Source identifier: 9444850}
}