Урузбаева, Н. А., and А. Ж. Байгужина. “Features of Pricing in the Field of Telecommunications of Kazakhstan”. Journal of Economic Research & Business Administration 88, no. 6 (September 8, 2015): 94–98. Accessed November 24, 2024. https://be.kaznu.kz/index.php/math/article/view/853.