Berezina , T., K. Buzanov, A. M. Zinatullina, A. A. Kalaeva, and V. P. Melnik. “The Expectation of Retirement As a Psychological Stress That Affects the Biological Age in the Person of the Russian Federation”. Religación, Vol. 4, no. 18, Aug. 2019, pp. 192-8, https://revista.religacion.com/index.php/religacion/article/view/419.