Хорошуха, Михайло Федорович. “Health-Improving Action Effects of the System of P. K. Ivanov and Breathing Technique on the Method of K. P. Buteyko for People of Different Age (from the Long-Term Experience of the Author)”. Slobozhanskyi Herald of Science and Sport, no. 1(51) (February 29, 2016): 107–111. Accessed December 7, 2025. https://journals.uran.ua/index.php/1991-0177/article/view/61279.