Кутумова, Ольга Юрьевна, et al. “SOCIAL AND HYGIENIC EVALUATION OF THE APPEALABILITY OF THE POPULATION ABOVE THE EMPLOYABLE AGE BEHIND MEDICAL CARE”. Medicine in Kuzbass, vol. 18, no. 3, Sept. 2019, pp. 29-35, https://www.mednauki.ru/index.php/MK/article/view/366.