Signal-shape locked loop (SSLL) as an adaptive separator of cardiac and respiratory components of bio-impedance signalKrivoĊĦei, Andrei; Min, Mart; Kukk, VelloIEEE International Workshop on Medical Measurement and Applications : MeMeA-2007 : Warsaw, Poland, 4-5 May 20072007 / p. 47-52 https://ieeexplore.ieee.org/document/4285161