Metshein, M., Parve, T., Annus, P., Rist, M., & Min, M. (2017). Realization and Evaluation of the Device for Measuring the Impedance of Human Body for Detecting the Respiratory and Heart Rate. Elektronika Ir Elektrotechnika, 23(3), 36-42. https://doi.org/10.5755/j01.eie.23.3.18330