Shakirova, Alisa F., and Elena P. Demkina. “Conceptualization of the Efficiency Model of the Institution of Social Protection of Population (Part 1)”. Population 24, no. 1 (March 30, 2021): 66-76. Accessed July 3, 2024. https://jour.fnisc.ru/index.php/population/article/view/7911.