Шталь, Т., Рахимбекова A., Г. Укубасова, and Е. Әмірбекұлы. 2018. “Ensuring the Value Chain As a Factor in Industrial Competitiveness”. Journal of Economic Research &Amp; Business Administration 125 (3):290-97. https://be.kaznu.kz/index.php/math/article/view/2022.