Amirgaliyev B, Abdirakhmanova M, Baishemirov Z, Yegemberdiyeva G. DETERMINATION OF THE OPTIMAL CONTROLLABLE KEY INDICATOR OF CALL CENTER IN ORDER TO INCREASE EFFICIENCY FOR GENERATING INCOME. sjaitu [Internet]. 2023 Sep. 30 [cited 2024 Dec. 26];15(15):5-15. Available from: http://journal.astanait.edu.kz/index.php/ojs/article/view/348