Kazbekova L., Kurmangali A., Yerniyazova Zh., Akhmetova A., и Utegenova K. 2020. «MODELS OF DEFINED CONTRIBUTION PENSION SYSTEMS IN FOREIGN COUNTRIES». Academic Journal of Physical and Chemical Sciences, вып. 4 (август):186-93. http://89.250.84.46/reports-science/article/view/1043.