Ketova КВ, Vavilova ДД, Cherepanova АС. STUDY OF THE INFLUENCE OF DEMOGRAPHIC, SOCIO-ECONOMIC, MEDICAL-BIOLOGICAL, ENVIRONMENTAL, ETHNIC FACTORS ON FERTILITY IN THE UDMURT REPUBLIC. СЭУ [Internet]. 2024 Apr. 8 [cited 2024 May 17];20(1):26-35. Available from: https://izdat.istu.ru/index.php/social-economic-management/article/view/5798