Markovics, Zigurds, Juris Lauznis, Matiss Erins, Olesja Minejeva, and Raivis Kivlenieks. “Testing and Analysis of the HRV Signals from Wearable Smart HRV Sensors”. International Journal of Engineering & Technology 7, no. 4.36 (December 9, 2018): 1211–1215. Accessed November 22, 2024. https://sciencepubco.com/index.php/ijet/article/view/28214.