50 Hz electric field effect on heart rate variabilityKoppel, Tarmo; Vilcane, IneseThe Joint Annual Meeting of The Bioelectromagnetics Society and the European BioElectromagnetics Association : Technical Program and General Information2019 / p. 91 https://www.bioem2019.org/wp-content/uploads/2019/06/BioEM2019_FinalProgram_20190617_V6.pdf