“Assessment of the Relationship of Costs, Sales and Profits in the Refinery Production on the Example of LLP «Atyrau Refinery»”. ҚазҰУ хабаршысы. Экономика сериясы, vol. 112, no. 6, Apr. 2016, https://be.kaznu.kz/index.php/math/article/view/1087.