Nazarenko, E., S.A.S. Belal, A. Martynenko, and N. Yabluchanskiy. “Reaction of Heart Rate Variability Parameters in Biofeedback Sessions in the Loop of Paced Breathing in Healthy Volunteers”. Medicine Today and Tomorrow 66, no. 1 (March 8, 2020): 43–46. Accessed April 4, 2025. https://msz.knmu.edu.ua/article/view/464.