. Anaes, Intérêt et indications des modes de surveillance du rythme cardiaque ftal au cours de laccouchement normal, Gynecol Obstet Fertil, vol.31, pp.393-396, 2003.

V. Equy, S. Buisson, M. Heinen, J. Schaal, P. Hoffmann et al., Confusion between maternal and fetal heart rate during the second stage of labour, Br J Midwifery, vol.20, issue.11, pp.794-798, 2012.

K. Bhogal and J. Reinhard, Maternal and fetal heart rate confusion during labour, Br J Midwifery, vol.18, issue.7, pp.424-428, 2010.

P. C. Adithya, R. Sankar, W. A. Moreno, and S. Hart, Trends in fetal monitoring through phonocardiography: Challenges and future directions, Biomed Sig. Proc. Control, vol.33, pp.289-305, 2017.

J. Pan and W. J. Tompkins, A real-time qrs detection algorithm, IEEE Trans Biomed Eng, vol.32, issue.3, pp.230-236, 1985.

L. De-lathauwer, B. D. Moor, and J. Vandewalle, Fetal electrocardiogram extraction by blind source subspace separation, IEEE Trans Biomed Eng, vol.47, issue.5, pp.567-572, 2000.

V. Zarzoso and A. K. Nandi, Noninvasive fetal electrocardiogram extraction: blind separation versus adaptive noise cancellation, IEEE Trans Biomed Eng, vol.48, issue.1, pp.12-18, 2001.

R. Sameni, Extraction of fetal cardiac signals from an array of maternal abdominal recordings, 2008.
URL : https://hal.archives-ouvertes.fr/tel-00373361

A. Jiménez, M. Ortiz, M. Peña, S. Charleston, R. González et al., Performance of a method to generate fetal cardiotachograms using fetal phonocardiography, Comput Cardiol, pp.453-456, 2001.

F. Kovács, M. Torok, and I. Habermajer, A rule-based phonocardiographic method for long-term fetal heart rate monitoring, IEEE Trans Biomed Eng, vol.47, issue.1, pp.124-130, 2000.

H. E. Bassil and J. H. Dripps, Real time processing and analysis of fetal phonocardiographic signals, Physiol Meas, vol.10, issue.4B, p.67, 1989.

R. A. Pretlow and J. W. Stoughton, Signal processing methodologies for an acoustic fetal heart rate monitor, 1991.

A. Mittra and N. Choudhari, Time-frequency analysis of foetal heart sound signal for the prediction of prenatal anomalies, J Med Eng Technol, vol.33, issue.4, pp.296-302, 2009.

S. R. Messer, J. Agzarian, and D. Abbott, Optimal wavelet denoising for phonocardiograms, Microelectronics J, vol.32, issue.12, pp.931-941, 2001.

A. Jimenez-gonzalez and C. James, Blind source separation to extract foetal heart sounds from noisy abdominal phonograms: A single channel method, IET MEDSIP

M. Ruffo, M. Cesarelli, M. Romano, P. Bifulco, and A. Fratini, An algorithm for fhr estimation from foetal phonocardiographic signals, Biomed Signal Process Control, vol.5, issue.2, pp.131-141, 2010.

F. Kovcs, C. Horvth, T. Balogh, and G. Hossz, Fetal phonocardiographypast and future possibilities, Comput Methods Programs Biomed, vol.104, issue.1, pp.19-25, 2011.

P. Paatero and U. Tapper, Positive matrix factorization: A nonnegative factor model with optimal utilization of error estimates of data values, Environmetrics, vol.5, issue.2, pp.111-126, 1994.

D. D. Lee and H. S. Seung, Learning the parts of objects by nonnegative matrix factorization, Nature, vol.401, issue.6755, p.788, 1999.

J. Durrieu, A. Ozerov, C. Févotte, G. Richard, and B. David, Main instrument separation from stereophonic audio signals using a source/filter model, IEEE EUSIPCO, pp.15-19, 2009.

N. Dia, J. Fontecave, P. Gumery, and B. Rivet, Heart rate estimation from phonocardiogram signals using non-negative matrix factorization, Proc. IEEE ICASSP, 2019.
URL : https://hal.archives-ouvertes.fr/hal-02274640