Akhmejanova G. B., Mussabekova N. M., Voronova T. E., Batay A., и Grigorieva R. V. «ESSENCE OF SOCIAL INSURANCE, ITS ROLE AND PLACE IN THE SYSTEM OF SOCIAL PROTECTION OF THE POPULATION». «Вестник НАН РК», вып. 2, апрель 2021 г., сс. 198-03, http://189185.vm7pq.group/bulletin-science/article/view/217.