Bruser C.; Stadlthanner K.; de Waele S.; Leonhardt S. (September 2011). «Adaptive beat-to-beat heart rate estimation in ballistocardiograms». IEEE Transactions on Information Technology in Biomedicine15 (5): 778-86. PMID21421447. doi:10.1109/TITB.2011.2128337.
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Bruser C.; Stadlthanner K.; de Waele S.; Leonhardt S. (September 2011). «Adaptive beat-to-beat heart rate estimation in ballistocardiograms». IEEE Transactions on Information Technology in Biomedicine15 (5): 778-86. PMID21421447. doi:10.1109/TITB.2011.2128337.