Сибіль [Maria Sybyl] М.Г., Свищ [Yaroslav Svysch] Я.С., Воронін [Denis Voronin] Д.М. and Кирилич [Maryana Kyrylych] М.І. 2013. Improve the quality of the third age life with health-improving systems which based on elements of breathing exercises. Slobozhanskyi Herald of Science and Sport. 5(38) (Dec. 2013), 239–242.