Федорюк [Fedoryuk O.] О. В. “Recreational Activity As an Important Method of Saving Somatic Health of People 55–65 Years of Age”. Slobozhanskyi Herald of Science and Sport, no. 3(36), June 2013, pp. 171-5, https://journals.uran.ua/index.php/1991-0177/article/view/23570.