Serjanova Dilbar Saatbaevna, and Shaudenbaev Nurmuxammed Murat uli. “5G AND ITS FREQUENCY SPECTRUM SPEED”. Zeta Repository 4, no. 3 (March 12, 2023): 378–381. Accessed April 8, 2025. https://zetarepo.com/index.php/zr/article/view/811.