Availability and variations of cardiac activity in the case of measuring the bioimpedance of wristMetshein, Margus; Annus, Paul; Land, Raul; Min, Mart; Aabloo, Alvo2018 IEEE International Instrumentation and Measurement Technology Conference (I2MTC 2018) : proceedings2018 / 5 p. : ill https://doi.org/10.1109/I2MTC.2018.8409684