1. Abramov V.I., Churkin D.A. Assessing the maturity level of the customer relationship management system.Vestnik GUU. 2022. No. 12. Pp. 5–13.
2. Akishin V.A., Kislyakov S.V., Fenomenov M.A. Functional architecture of a CEM complex for implementationin the IT landscape of a large telecom operator. T-Comm. 2016. No. 10. Pp. 12–16.
3. Bragin A.Yu. Innovative determinants of a client-centric approach in industrial business. Innovative economics: prospects for development and improvement. 2023. No. 3 (69). Pp. 17–22.
4. Kobylko A.A. Retrospective look at the strategies of telecom operators. Economics and quality ofcommunication systems. 2018. No. 2 (8). Pp. 4–13.
5. Kukharenko E.G. Study of the evolution of marketing concepts in the infocommunication business. T-Comm.2015. No. 9. Pp. 72–75.