Amirgaliyev, Beibut, Meruyert Abdirakhmanova, Zharasbek Baishemirov, and Gulzhan Yegemberdiyeva. 2023. “DETERMINATION OF THE OPTIMAL CONTROLLABLE KEY INDICATOR OF CALL CENTER IN ORDER TO INCREASE EFFICIENCY FOR GENERATING INCOME”. Scientific Journal of Astana IT University 15 (15):5-15. https://doi.org/10.37943/15SNLS1783.