A.A. Kurmanalina, A.I. Omarova, и A.M. Sapargali. «ANALYSIS OF ECONOMIC ACTIVITY AS THE BASIS FOR THE ADOPTION OF MANAGEMENT DECISIONS». «Доклады НАН РК», вып. 6, декабрь 2019 г., сс. 182-6, http://189185.vm7pq.group/reports-science/article/view/1815.