Raimondi, Gianfranco, Alexander Martynenko, L. Barsi, and Liudmila Maliarova. “Heart Rate Variability Series Analyzing by Fuzzy Logic Approach”. The Journal of V. N. Karazin Kharkiv National University, series "Medicine", no. 43 (December 1, 2021). Accessed May 2, 2024. https://periodicals.karazin.ua/medicine/article/view/18013.