Martynenko, Alexander, Gianfranco Raimondi, Nikita Budreiko, and Liudmila Maliarova. “Fuzzy Logic Approach for Heart Rate Variability”. The Journal of V. N. Karazin Kharkiv National University, series "Medicine", no. 42 (June 30, 2021). Accessed April 23, 2024. https://periodicals.karazin.ua/medicine/article/view/17480.