Multi-frequency and multi-channel bio-impedance measurement solution [Electronic resource]Märtens, Olev; Min, Mart; Land, Raul; Annus, PaulProceedings of 7th Nordic Signal Processing Symposium (NORSIG 2006) : Reykjavik, Iceland, June7-9, 20062006 / [4] p. [CD-ROM] https://ieeexplore.ieee.org/document/4052217